TWI449508B - Bed frame construction of portable crib - Google Patents

Description

Bed frame construction for portable crib

The present invention relates to a crib, and more particularly to a portable cradle bed.

Referring to Figures 1 and 2, a portable crib is disclosed in U.S. Patent No. 4,376,318. The portable cot 1 includes an upper frame 11 and a lower frame 12, and a plurality of vertical units 13 connecting the upper frame 11 and the lower frame 12. Each of the upper frame 11 and the lower frame 12 (FIG. 2 is an example of the above frame 11) has two opposite first side strips 101 and two second side strips 102 opposite to each other and connected to the first side strips 101 to form a frame. Each of the first side strips 101 has a first section 111 , a second section 112 , and a first pivoting element 113 pivoting the first section 111 and the second section 112 , and by the first pivoting element 113 The arrangement enables the first segment 111 and the second segment 112 to be folded inwardly toward each other, as shown in FIG. Furthermore, each vertical unit 13 has an upper section 131, a lower section 132 and a second pivoting element 133 connecting the upper section 131 and the lower section 132, and the upper section can be made by the arrangement of the second pivoting element 133. The portion 131 is longitudinally folded toward the lower portion 132 as shown in FIG. Therefore, the portable crib 1 has a folding design for the purpose of being convenient for the user to carry.

A portable crib as disclosed in U.S. Patent No. 6,687,928. A collapsible portable crib as disclosed in U.S. Patent No. 5,544,864. In summary, the above-mentioned portable crib is folded to achieve convenient carrying. However, the folding design is not the best portable type. If the crib has a detachable connection structure design, it will help to improve the convenience of the portable crib, which is the focus of this case.

Accordingly, it is an object of the present invention to provide a bed frame construction for a portable crib.

Thus, the bed frame structure of the portable crib of the present invention comprises a fence frame, a base frame and a plurality of connecting devices. The fence frame includes an arm frame and a plurality of upper columns pivotally connected to the lower edge of the arm frame. The base frame includes a plurality of lower columns corresponding to the upper columns, and a plurality of connecting devices respectively installed between the upper columns and the lower columns, such that the base frame is detachably combined with the fence frame .

The bed frame construction of the portable crib of the present invention comprises a fence frame and a base frame. The fence frame includes an arm frame and a plurality of upper columns pivotally connected to the lower edge of the arm frame. The base frame includes a plurality of lower columns, a plurality of connecting devices, a pair of cross bars and a pair of rockers, wherein the lower columns are disposed corresponding to the upper columns, and the connecting devices are respectively installed between the upper columns and the lower columns The crossbars are substantially parallel spaced and disposed between two adjacent connecting devices, the rockers being substantially parallel spaced and disposed adjacent the bottom ends of the lower posts.

The utility model has the advantages that the fence frame and the base frame are arranged in a detachable structure, so that the fence frame and the base frame can be disassembled and separated and then folded, thereby reducing the entire bed frame structure. The folded volume is convenient to carry, and the fence frame can be used alone or in combination with the base frame to generate a rocking function. Moreover, the two armrest sections of the armrest frame are designed to be detachably combined. Therefore, the bed frame structure of the portable crib is a detachable group structure, that is, it can be folded into the tote bag for convenient carrying. In addition, the bed frame structure of the portable crib has a rocking device that can change the crib between a swingable state and a fixed state.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 3 and FIG. 4, a first preferred embodiment of the portable crib of the present invention is provided. According to this embodiment, the portable crib 2 is adapted to be assembled into a flat shape and received in a tote bag (not shown). )Inside. The portable crib 2 has a bed frame structure, a bed cloth (not shown) and a bed board 20. The bed frame structure includes a fenced frame 2a and a base frame 2b that can be assembled. The fence frame 2a includes an arm frame 21 and a plurality of upper columns 22 pivotally connected to the lower edge of the arm frame 21, and the upper column 22 is a hollow column. The base frame 2b includes a plurality of lower pillars 23 corresponding to the upper uprights 22, and a plurality of connecting devices 3 for mounting between the upper uprights 22 and the lower uprights 23, and the lower uprights 23 are hollow tubular columns. Further, the basket frame 2a further includes a pair of bottom bars 27 respectively connected between the lower ends of each of the two upper columns 22 in the longitudinal direction 201, thereby increasing the structural stability of the fence frame 2a, and the base frame 2b further includes a horizontal The width direction 202 is connected to a pair of cross bars 24 of each of the two connecting devices 3, respectively. The bed seat cloth is used to cover the bed frame structure and form an accommodating space, and the bed board 20 is placed on the bottom surface of the bed seat cloth in the accommodating space. When the bed board 20 is placed on the underside of the bed cloth, the bed board 20 and the fence frame 2a together define an activity space 9 for the infant to move.

Referring to FIG. 3 and FIG. 5, the armrest frame 21 includes a two-phase connected armrest pipe section 211, and two connecting pipe plugs 212 disposed at the connecting ends of the two armrest pipe sections 211 and connecting the two armrest pipe sections 211. The two armrest sections 211 are U-shaped, and the two ends (ie, the connecting ends) of the two armrest sections 211 are disposed opposite to each other and are respectively connected to each other through the connecting plug 212. The outer wall surfaces of the connecting pipe plugs 212 are respectively recessed to form a recess 213. The inner wall surface of the connecting end of the armrest pipe section 211 is provided with a protrusion 214 which cooperates with the groove 213. The protrusion 214 may be formed in the armrest pipe section 211 in advance. The wall surface or the armrest pipe section 211 is sleeved after the connecting pipe plug 212, and then the inner surface of the armrest pipe section 211 corresponding to the groove 213 is pressed inwardly, so that the handrail pipe section 211 is deformed inwardly corresponding to the partial area of the groove 213. Formed thereby increasing the stability of the connection of the armrest tube section 211 to the connection plug 212 and allowing the two to separate under application. Further, a stopper portion 215 which is in contact with the end edge of the end portion of the armrest pipe section 211 is formed at the center of the connection pipe plug 212.

Referring to FIG. 3, FIG. 10, FIG. 11, the fence frame 2a further includes a plurality of elastic engaging members 32 (see FIG. 10) respectively disposed at the bottom ends of the upper uprights 22, and a plurality of upper edges disposed on the lower edge of the armrest frame 21 and the upper portion A pivoting device 4 between the columns 22. In this embodiment, each of the upper pillars 22 is provided with a first engaging hole 222 adjacent to the bottom end of the tube wall. The elastic engaging member 32 has a fixing block 321 , an arcuate elastic piece 322 extending upward from the top end of the fixing block 321 , and A stud button 323 formed on the curved elastic piece 322. The fixing block 321 is fixed to the bottom end of the upper column 22, and the fixing block 321 is formed with a third connecting hole 324. When the fixing block 321 is stuffed in the upper column 22, the partial wall of the upper column 22 corresponding to the third connecting hole 324 is stamped and deformed into the third connecting hole 324 by force application, thereby strengthening the upper column 22 and fixing. The connection of block 321 is robust. The curved elastic piece 322 is substantially inverted U-shaped for extending into the upper column 22, and the curved elastic piece 322 has a fixed end 391 fixed to the top end of the fixed block 321 and a connecting stud button 323 and includes a stud button 323. The free end 392, the stud button 323 is used to protrude the first engaging hole 222 of the upper column 22.

Referring to FIG. 3 and FIG. 6 to FIG. 8 , the pivoting device 4 includes a lower hinge bracket 41 connected to the top end of the upper pillar 22 , a lower edge connected to the armrest frame 21 and a pivot pin 43 connected to the lower hinge bracket 41 . The upper hinge bracket 42 is pivotally connected. The lower hinge bracket 41 has a connecting portion 411 which is tubular and is inserted into the top end of the upper pillar 22, and two wings 412 which are upwardly extended by the top edge of the connecting portion 411 and are spaced apart in parallel to form a pivoting space 413, each wing portion The 412 has a through hole 414 into which the pivot pin 43 is inserted. The upper hinge bracket 42 is inserted into the pivoting space 413 and has a through hole 420 through which the pivot pin 43 is bored. By means of this pivoting device 4, the upper upright 22 connected to the lower hinged bracket 41 can be pivoted relative to the upper hinged bracket 42 as shown in FIG.

Furthermore, the top edge of the connecting portion 411 of the lower hinge bracket 41 is recessed to form a slot 415 for communicating with the pivoting space 413. The bottom edge of the upper hinge bracket 42 is provided with a block 421 movable to the slot 415. When the lower articulated carriage 41 is pivoted relative to the upper hinged carriage 42 to the position, the bottom wall 415a of the slot 415 abuts against the block 421 to limit excessive pivoting of the lower articulated carriage 41. By the cooperation of the block 421 and the slot 415, the pivoting range of the upper column 22 can be restricted. Further, since the block 421 and the slot 415 are disposed on the lower hinge bracket 41 and the upper hinge bracket 42 One side of the rotation of the side produces a stop action, so in the present embodiment, the upper upright 22 can only be folded toward the opposite side of the side, i.e., can only be folded inward. In the present embodiment, the upper hinge bracket 42 is fixed to the lower edge of the arm frame 21 by an L-shaped connecting piece 44, and the connecting piece 44 also has a through hole 441 through which the pivot pin 43 is bored. Then, one side of the connecting piece 44 is screwed to the lower edge of the arm frame 21, and the other side is connected to the upper hinge bracket 42 by the pivot pin 43. In addition, the connecting portion 411 of the lower hinge bracket 41 is recessed to form a recess 416, and the inner wall surface of the top end of the upper post 22 is provided with a protrusion 221 that cooperates with the recess 416, thereby thereby positioning the upper post 22 to be connected. For the effect of the portion 411, the bump 221 can be formed in the same manner as the bump 214 of FIG.

Referring to FIG. 3 and FIG. 9 to FIG. 11, the connecting device 3 includes a tubular post joint 31 for inserting the bottom end of the upper column 22 and the top end of the lower column 23. A third engaging hole 231 and a first connecting hole 232 are respectively defined in a side surface and a front surface of the top end of the lower column 23 . A second engaging hole 311 is defined in the center of the side of the column joint 31, and a second connecting hole 312 is defined in the bottom end of the front surface.

As shown in FIG. 11, since the outer diameter of the top end of the lower column 23 is smaller than the inner diameter of the column joint 31, and the outer diameter of the bottom end of the upper column 22 is smaller than the inner diameter of the top end of the lower column 23, the connection relationship of the three is the top of the lower column 23. The bottom end of the column joint 31 is inserted and extends to the top end of the column joint 31, and the bottom end of the upper column 22 is inserted into the top end of the lower column 23, that is, the column joint 31 is located at the outermost layer, and the bottom end of the upper column 22 is located at the innermost layer, and the lower column 23 The top is in the middle of the stacking assembly.

In the design, the first connecting hole 232 and the second connecting hole 312 are opposite to each other, and are connected by rivets, so that the column joint 31 is connected and fixed to the lower column 23, and further, when the bottom end of the upper column 22 extends into the column joint 31 and When the post 23 is lowered, the first engaging hole 222, the second engaging hole 311 and the third engaging hole 231 are in opposite positions, so that the stud button 323 can be laterally displaced through the second engaging hole 311 and The third engaging hole 231 protrudes out of the column joint 31 for the user to press. Therefore, when the base frame 2b is to be separated, the convex button 323 is laterally pressed, so that the free end 392 of the curved elastic piece 322 is adjacent to the fixed end 391, and the protruding button 323 is retracted into the second engaging hole 311 and the third. After the engagement hole 231 is released and the structure of the post button 323 is released from the column joint 31 and the lower column 23, the bottom end of the upper column 22 can be separated upward by the column joint 31. On the contrary, when the fence frame 2a and the base frame 2b are to be combined by the bottom end of the upper column 22 and the top end of the lower column 23, the bottom end of the upper column 22 is inserted into the top of the lower column 23 which has been inserted into the column joint 31. The plunger button 323 is squeezed into the first engaging hole 222 until the first engaging hole 222 corresponds to the third engaging hole 231 and the second engaging hole 311. The stud button 323 is inserted through the third engaging hole 231 and the second engaging hole 311 and exposed. In this way, the connection is achieved. In addition, the outer wall surface of the column joint 31 around the second engaging hole 311 is slightly recessed to facilitate the user to press the stud button 323 to exit the second engaging hole 311.

In connection with Figs. 9, 10 and 11, the connecting device 3 further includes a transverse joint 33 which is provided on the side of the column joint 31 and into which the crossbar 24 is inserted and connected. Therefore, as shown in FIG. 3, both ends of the crossbar 24 are inserted into the lateral joints 33 and are disposed transversely between the top ends of the two lower pillars 23. In the present embodiment, the column joint 31 and the transverse joint 33 are integrally formed, and the transverse joint 33 and the cross bar 24 The side faces are provided with connecting holes 331, 241 which are opposite to each other and are connected.

The following is a description of the folding step of the bed frame structure of the portable crib 2. First, the stud button 323 is pressed to unlock, the bottom end of the upper post 22 is disengaged from the post joint 31, and the fence frame 2a is separated from the base frame 2b. . Then, a reverse pulling force is applied to the joint of the two armrest pipe sections 211, so that the bumps 214 in the armrest pipe section 211 are disengaged from the groove 213 of the connecting pipe plug 212, thereby disassembling the two armrest pipe sections 211 to reduce the volume. By the design of the pivoting device 4, the armrest pipe section 211 and the upper column 22 can be folded together. Finally, the separate components can be folded into the tote bag for portable purposes.

Referring to FIG. 3 and FIG. 12 to FIG. 15, the base frame 2b further includes a plurality of rockers 25 disposed at the bottom ends of the uprights 23 connected to the upper ends of the rails 24, and the rocker 25 has an arc shape with both ends facing upward. The rocker 25 and the bottom end of the lower column 23 are connected by a curved rocker joint 28, and a rocking device 5 is attached to the side wall of the rocker joint 28 to provide a standing use function of the baby bed. The anti-sway device 5 includes a circular shifting plate 51 having two diametrically opposed gear positions 52, and a pivotal connection to the side wall of the rocker joint 28 and being selectively engageable with the gear bump 52. Long strip stop block 53. The side of the rocker joint 28 has a positioning piece 54. The positioning piece 54 is formed with a positioning groove 541. The position plate 51 is provided with a positioning rib 511 which is engaged with the positioning groove 541, thereby fixing the gear plate 51 to the rocking device. The rod joint 28 and the side of the rocker 25. As shown in FIG. 13, a consistent hole 510 is defined in the center of the gear plate 51. The rocker joint 28 is provided with a first pivot hole 281 at one end of the rocker 25, and the rocker 25 is also provided with a first pivot. a second pivot hole 250 of the receiving hole 281, the rocking block 53 has a pair of third pivotal joints between the first pivoting hole 281 and the second pivoting hole 250 The hole 530 is disposed on the third pivot hole 530, the through hole 510, the second pivot hole 250 and the first pivot hole 281 by a shaft pin (not shown), so that the rocking block 53 can be relative to the gear position. The plate 51 pivots.

As shown in FIG. 14, the inner wall surface of the rocking block 53 is formed with four symmetrical gear slots 531. Therefore, the gear bump 52 is aligned and engaged with the different gear slots 531, so that the rocking block 53 is convex. The lower edge of the rocker 25 is raised or not projected. Therefore, as shown in FIG. 3 and FIG. 4, by the arrangement of the rocker 25 and the anti-sway device 5, the crib 2 can be changed between a swingable state and a fixed state to increase the functionality of the crib 2. . In addition, referring to FIG. 16, the lower edge of the rocker 25 is recessed to form an engaging groove 251, and the top of the sliding bar 26 is externally fitted to the contour of the engaging groove 251, whereby the sliding bar 26 is detachably combined with the rocker 25 The engagement slot 251 is configured to prevent the crib 2 from slipping when rocking.

Referring to Fig. 17, in addition to the swingable state and the fixed state described above, the portable crib 2 can also detach the base frame 2b from the fence frame 2a, leaving only the fence frame 2a in a third use state, and the fence frame 2a is supported by the bottom end of the upper column 22 on the placed plane (such as on the ground) for the child to be positioned in the movable space 9 defined by the armrest frame 21 and the upper uprights 22 and the seat cloth.

Referring to Figures 18 to 20, a second preferred embodiment of the portable crib of the present invention is shown. The bed frame configuration of the portable crib 2' differs from the bed frame configuration of the portable crib 2 of the first preferred embodiment in the anti-roll device and the rocker joint. The rocker joint 29 is also used to connect the lower column 23 and the rocker 25, except that the inner side of the rocker joint 29 is recessed to form an accommodating space 291, and the wall surface of the accommodating space 291 is provided with a first pivot hole 292. As shown in Figure 19, The anti-sway device 6 of the portable crib 2' includes a gear bump 61 disposed on the wall of the accommodating space 291 and offset from the first pivot hole 292, and a housing 291 can be accommodated in the accommodating space 291 and pivotally received. The rocker block 62 of the wall 291. The rocking block 62 has a second pivot hole 620 opposite to the first pivot hole 292, and is disposed through the first pivot hole 292 and the second pivot hole 620 through a shaft pin (not shown). The rocking block 62 is pivotally connected to the wall of the accommodating space 291. As shown in FIG. 20, the inner side of the anti-roll block 62 is recessed to form two spaced-apart gear slots 621. Therefore, the gear bumps 61 are aligned to the different gear slots 621, so that the rocker 62 protrudes. Or the lower edge of the rocker 25 is not protruded. The rest of the description is the same as the first preferred embodiment, so the description is not repeated.

In summary, the bed frame structure of the portable crib 2, 2' is such that the upper column 22 and the lower column 23 are detachably combined by the design of the connecting device 3 and the elastic engaging member 32, and the fence frame 2a can be Use alone. In addition, the design of the pivoting device 4 allows the upper column 22 to be folded relative to the arm frame 21. Moreover, the two armrest sections 211 of the armrest frame 21 are designed to be detachably combined. Therefore, the bed frame structure of the portable crib 2, 2' is a detachable structure, that is, can be folded into the tote bag for convenient carrying. . Furthermore, the bed frame structure of the portable crib 2, 2' has anti-sway devices 5, 6 which allow the cribs 2, 2' to be shifted between a swingable state and a fixed state.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2, 2'‧‧‧ portable cot

2a‧‧‧Fence frame

2b‧‧‧Base frame

20‧‧‧ bed board

201‧‧‧Longitudinal direction

202‧‧‧ transverse direction

21‧‧‧Architectural frame

211‧‧‧Handrail section

212‧‧‧Connected pipe plug

213‧‧‧ Groove

214‧‧‧Bumps

215‧‧‧stops

22‧‧‧Upstanding column

221‧‧‧Bumps

222‧‧‧First engagement hole

23‧‧‧Lower column

231‧‧‧The third snap hole

232‧‧‧first connection hole

24‧‧‧crossbar

25‧‧‧ rocker

250‧‧‧Second pivot hole

26‧‧‧stop slider

27‧‧‧ bottom pole

28‧‧‧ rocker joint

281‧‧‧First pivot hole

29‧‧‧ rocker joint

291‧‧‧ accommodating space

292‧‧‧First pivot hole

3‧‧‧Connecting device

31‧‧‧Post joint

311‧‧‧Second snap hole

312‧‧‧Second connection hole

32‧‧‧Flexible snap fittings

321‧‧‧Fixed block

322‧‧‧Shaft shrapnel

323‧‧‧Bump button

324‧‧‧ third connection hole

33‧‧‧ transverse joint

391‧‧‧ fixed end

392‧‧‧Free end

4‧‧‧ pivoting device

41‧‧‧ Lower hinge bracket

411‧‧‧Connecting Department

412‧‧‧ wing

413‧‧‧ pivot space

414‧‧‧through holes

415‧‧‧ slotting

416‧‧‧ Groove

42‧‧‧Upper hinge bracket

421‧‧‧ card block

43‧‧‧ pivot

44‧‧‧Connecting piece

441‧‧‧through holes

5‧‧‧Anti-rolling device

51‧‧‧ stall board

510‧‧‧through holes

511‧‧‧ positioning ribs

52‧‧‧ stall bump

53‧‧‧止摇块

531‧‧‧ positioning slot

530‧‧‧The third pivot hole

54‧‧‧ Positioning film

541‧‧‧ positioning slot

6‧‧‧Anti-rolling device

61‧‧‧ stall bump

62‧‧‧止摇块

620‧‧‧Second pivot hole

621‧‧‧ gear slot

9‧‧‧Event space

1 is a side view showing a conventional portable crib; FIG. 2 is a plan view showing a conventional portable crib from another angle; FIG. 3 is a perspective view showing the portable baby of the present invention; The first preferred embodiment of the bed is in a swingable state; FIG. 4 is a perspective view showing the portable crib in a fixed state; and FIG. 5 is a partial exploded perspective view showing the group of the arm frame of the bed frame structure. FIG. 6 is a partial perspective view showing the connection relationship of the pivoting device of the bed frame structure; FIG. 7 is a partial exploded perspective view showing the components of the pivoting device of the bed frame structure; FIG. 8 is a schematic view illustrating The upper column can be pivoted to the armrest pipe section; FIG. 9 is a partial perspective view showing the connection relationship of the connection device of the bed frame structure; FIG. 10 is a partial exploded perspective view showing the components of the connection device of the bed frame structure; 11 is a schematic cross-sectional view showing the engagement of the engaging holes of the upper column, the lower column and the connecting device with the elastic engaging member; FIG. 12 is a partial perspective view showing the rocking device of the bed frame structure of the first preferred embodiment Figure 13 is A partial exploded perspective view of the first preferred embodiment of the locking Example FIG. 14 is a perspective view showing the inner structure of the rocking block of the anti-shake device of the first preferred embodiment; FIG. 15 is a perspective view showing the gear of the anti-shake device of the first preferred embodiment. FIG. 16 is a partially exploded perspective view showing the connection structure of the rocker and the anti-slip bar of the first preferred embodiment; FIG. 17 is a perspective view showing the portable type of the first preferred embodiment. The bed frame structure of the crib is used in a third state of use of the fence frame alone; FIG. 18 is a perspective view showing a second preferred embodiment of the portable crib of the present invention, and a rocking device for explaining the structure of the bed frame; Is a partially enlarged view showing the structure of a rocking device of the second preferred embodiment of the portable crib of the present invention; and FIG. 20 is a perspective view showing the anti-rolling device of the second preferred embodiment The inner structure of the block.

2‧‧‧Portable Crib

2a‧‧‧Fence frame

2b‧‧‧Base frame

20‧‧‧ bed board

201‧‧‧Longitudinal direction

202‧‧‧ transverse direction

21‧‧‧Architectural frame

211‧‧‧Handrail section

212‧‧‧Connected pipe plug

22‧‧‧Upstanding column

23‧‧‧Lower column

24‧‧‧crossbar

25‧‧‧ rocker

26‧‧‧stop slider

27‧‧‧ bottom pole

28‧‧‧ rocker joint

3‧‧‧Connecting device

4‧‧‧ pivoting device

5‧‧‧Anti-rolling device

9‧‧‧Event space

Claims (31)

A bed frame structure of a portable crib, characterized in that: the bed frame structure of the portable crib comprises: a fence frame, comprising an arm frame, and a plurality of upper columns pivotally connected to the lower edge of the arm frame; a first engaging hole is disposed at a bottom end of each upper column, the fence frame further includes a plurality of elastic engaging members respectively disposed at bottom ends of the upper columns; and a base frame including a plurality of lower portions corresponding to the upper columns a column and a plurality of connecting devices respectively installed between the upper column and the lower column to detachably combine the base frame and the fence frame, each of the upper columns and the corresponding lower column Separably engaging by one of the elastic engaging members, each connecting device has a column joint for inserting the bottom end of the upper column and the top end of the lower column, and the column joint is provided with a pair of the first card a second engaging hole of the hole, wherein each of the elastic engaging members has a post button that can be laterally displaced to the first engaging hole and the second engaging hole and protrudes from the column joint . The bed frame structure of the portable crib according to claim 1, wherein the base frame further comprises a pair of cross bars, each of the cross bars being connected between the pair of connecting devices. The bed frame construction of the portable crib according to claim 2, wherein each of the connecting devices further comprises a transverse joint for inserting the crossbar. The bed structure of the portable crib according to claim 1 of the patent application scope The utility model is characterized in that: each upper column and each lower column is a hollow pipe column, the top end of the lower column is inserted into the bottom end of the column joint, and the bottom end of the upper column is inserted into the top end of the column joint and the top end of the lower column, and the The elastic engaging member is received in the bottom end of the upper column. The bed frame structure of the portable crib according to claim 4, wherein each of the lower pillars is provided with a pair of third engaging holes that should be the first engaging holes and the second engaging holes. The protrusion button can be laterally displaced through the first engaging hole, the second engaging hole and the third engaging hole. The bed frame structure of the portable crib according to claim 1, wherein the elastic engaging member comprises a curved elastic piece located in the bottom end of the upper column, the curved shape The elastic piece has a fixed end fixed to the bottom end of the upper column and a free end including the button of the protrusion, and the protrusion button can be laterally pressed to exit the second engaging hole and the third engaging hole. The bed frame structure of the portable crib according to claim 1, wherein the fence frame further comprises a plurality of pivoting devices disposed between the lower edge of the arm frame and the upper columns, so that The upper columns can pivot toward the arm frame. The bed frame structure of the portable crib according to claim 7, wherein each pivoting device comprises a lower hinge bracket connected to the top end of the upper column, and a frame connected to the arm frame a lower hinge and an upper hinge bracket for pivoting the lower hinge bracket. Bed structure of a portable crib according to claim 8 of the patent application scope The lower hinge bracket has a connecting portion connecting the upper column and two wings extending upward from the top edge of the connecting portion and spaced apart to form a pivoting space. The bed frame structure of the portable crib according to claim 9 is characterized in that: the top edge of the connecting portion of the lower hinge bracket is provided with a slot, and the bottom edge of the upper hinge bracket is provided with a slot Active in the slotted block. The bed frame structure of the portable crib according to claim 1, wherein the arm frame comprises two connected armrest sections, and the connecting ends of the two armrest sections and the two armrest sections are connected. Two connection pipe plugs. The bed frame structure of the portable crib according to claim 11, wherein the outer wall surface of the connecting pipe plug is recessed to form at least one groove, and the inner wall surface of the connecting pipe end portion is provided with at least one inner wall surface. a bump that cooperates with the groove. The bed frame structure of the portable crib according to claim 1, wherein the base frame further comprises a pair of curved rockers disposed at a bottom end of the lower column. The bed frame structure of the portable crib according to claim 13 is characterized in that the lower edge of the curved rocker has a slip bar. The bed frame structure of the portable crib according to claim 13 is characterized in that: the bed frame structure of the portable crib further comprises a plurality of anti-rolling devices respectively disposed at two ends of the rockers. Each anti-roll device includes at least one gear bump disposed on one side of the rocker, and a pivot a rocking block connected to the side of the rocker and aligning the bump of the gear, the side of the rocker facing the side of the rocker is provided with a plurality of gear slots engaged with the gear bumps, by the gear The bit bumps are positioned in different gear slots such that the rocker pivots relative to the rocker selectively between a rocking state and a collapsed state. The bed frame structure of the portable crib according to claim 1, wherein the fence frame further comprises two bottom bars, and the bottom bars are respectively disposed on the adjacent two upper columns in parallel with each other. . The bed frame structure of the portable crib according to claim 4, wherein the elastic engaging member has a fixing block, and the elastic engaging member is fixed to the upper column by the fixing block. Bottom end. A bed frame structure for a portable crib, characterized in that the bed frame structure comprises: a fence frame comprising an armrest frame and a plurality of upper columns pivotally connected to the lower edge of the arm frame, and each bottom column is provided at the bottom end a first engaging hole, the fence frame further includes a plurality of elastic engaging members respectively disposed at the bottom ends of the upper columns; and a base frame including a plurality of lower columns corresponding to the upper columns; the plurality of connecting devices respectively Installed between the upper column and the lower column, each connecting device has a column joint for inserting the bottom end of the upper column and the top end of the lower column, the column joint is provided with a pair of the first engaging hole a second engaging hole, wherein each of the elastic engaging members has a laterally displaceable passage through the first engaging hole and The second engaging hole protrudes from the stud button of the post joint; a pair of cross bars are substantially parallel spaced and respectively disposed between two adjacent connecting devices; and a pair of rockers are substantially parallel spaced And disposed at the bottom end of the adjacent lower columns. The bed frame structure of the portable crib according to claim 18, wherein each upper column and each lower column are hollow pipe columns, and the top end of the lower column is inserted into the bottom end of the column joint. The bottom end of the upper column is inserted into the top end of the column joint and the top end of the lower column, and the elastic engaging member is received in the bottom end of the upper column. The bed frame structure of the portable crib according to claim 19, wherein a top end of each lower column is provided with a pair of third engaging holes between the first engaging hole and the second engaging hole. The hole button is configured to be laterally displaced through the first engaging hole, the second engaging hole and the third engaging hole. The bed frame structure of the portable crib according to any one of claims 18 to 20, wherein the elastic engaging member comprises an arcuate elastic piece located in a bottom end of the upper column. The arc-shaped elastic piece has a fixed end fixed to the bottom end of the upper column and a free end including the button of the protrusion, the protrusion button can be laterally pressed to exit the second engaging hole and the third engaging hole . A bed frame construction for a portable crib according to claim 18, wherein each of the attachment means further includes a transverse joint for the insertion of the crossbar. The bed frame structure of the portable crib according to claim 18, wherein the fence frame further comprises a plurality of pivoting devices disposed between the lower edge of the arm frame and the upper columns, so that The upper columns can pivot toward the arm frame. The bed frame structure of the portable crib according to claim 23, wherein each pivoting device comprises a lower hinge bracket connected to the top end of the upper column, and a frame connected to the arm frame a lower hinge and an upper hinge bracket for pivoting the lower hinge bracket. The bed frame structure of the portable crib according to claim 24, wherein the lower hinge bracket has a connecting portion connecting the upper column and two extending upward from the top edge of the connecting portion and parallel Spaced to form a wing of a pivoting space. The bed frame structure of the portable crib according to claim 25, wherein a top edge of the connecting portion of the lower hinge bracket is provided with a slot, and a bottom edge of the upper hinge bracket is provided with a slot Active in the slotted block. The bed frame structure of the portable crib according to claim 18, wherein the armrest frame comprises two connected armrest pipe segments, and two connecting arms of the two armrest pipe segments and connecting the two armrest pipe segments Connect the pipe plug. The bed frame structure of the portable crib according to claim 27, wherein the outer wall surface of the connecting pipe plug is recessed to form at least one groove, and the inner wall surface of the connecting arm pipe end portion is provided with at least one groove. a bump that cooperates with the groove. The bed frame structure of the portable crib according to claim 18, wherein the lower edge of the curved rocker has a slip bar. The bed frame structure of the portable crib according to claim 29, wherein the bed frame structure of the portable crib further comprises a plurality of anti-roll devices disposed at two ends of the rockers, each A rocking device includes at least one gear bump disposed on one side of the rocker, and a rocking block pivotally coupled to the rocker side and aligning the gear bump, the rocker facing the rocker The side of the side surface is provided with a plurality of gear slots engaged with the gear bumps, wherein the gear bumps are aligned in different gear slots, so that the rocking block is selectively opposite to the rocker Pivoting between a stalled state and a collapsed state. The bed frame structure of the portable crib according to claim 18, wherein the fence frame further comprises two bottom bars, and the bottom bars are respectively disposed on the adjacent two upper columns in parallel with each other. .