TWI622370B - Up and down adjustment structure of the headrest of the chair - Google Patents

Abstract

The upper and lower adjustment structure of the headrest of the chair is mounted on a back frame of the chair so that the headrest can be adjusted up and down relative to the back frame, and comprises a sliding member, a fixing member and a button member; When the button member is pressed into the button slot of the fixing member, at least one elastic portion of the button member is compressed and deformed, and one of the button members of the button member is displaced away from the sliding member. a first row of teeth, the slider being vertically movable relative to the fixing member to synchronously adjust a downward position of the headrest; wherein when the slider is adjusted to a new position and the pressing of the button member is released After that, the button member is reset by the elastic restoring force of the at least one elastic portion, so that the button tooth row of the button member is also reset and re-engaged on a new position of the first tooth row of the sliding member. The slider cannot move up and down with respect to the fixing member, and the headrest is positioned at the adjusted new position.

Description

Up and down adjustment structure of the headrest of the chair

The invention relates to an upper and lower adjustment structure of a headrest, in particular to a headrest for a chair and comprises a sliding member, a fixing member and a button member upper and lower adjustment structure.

Modern people pay more attention to the comfort and functional design of the chair. Therefore, various functional devices such as the back or left and right movement of the chair armrest are added to the armrest, lumbar support or headrest of the chair, or such as lumbar or headrest. Adjust the function above.

However, the vertical adjustment structure of the conventional headrest is generally applied directly to the headrest so as to be able to move up or down when performing up-and-down adjustment, such that the force application often generates a large noise and requires a payment. The greater exertion caused the inconvenience of the old woman.

The inventor of the present invention has created TW105109443, CN201620252226.5, US15/149,893, and DE202016101985.0 in the field of chair armrests. Although the button-type control method and the use of the damping gear have been used, the above patented technology is applied to the armrest of the chair. It can't be directly applied to the headrest, for example, the arrangement relationship and the action mode between the moving parts and the fixing parts are different; in addition, the inventor of the present case has created CN201610844760.4 and US15/292,649 in the field of chair headrests, but The structural features of the above-mentioned headrest technology are basically different from the present case, so the present solution proposes a solution for the conventional technology.

The main object of the present invention is to provide an upper and lower adjustment knot of a headrest of a chair. The structure can be easily operated by the user to adjust the up and down position of the headrest, and has the effects of low impedance and low noise.

In order to achieve the above object, the present invention provides an upper and lower adjustment structure of a headrest of a chair for mounting on a back frame of the chair so that the headrest can be adjusted up and down relative to the back frame, and includes a sliding member and a The fixing member and the button member, wherein the sliding member is an elongated body extending upward and downward, the upper end of which is provided with a headrest connecting portion for connecting with the headrest, and a concave inner concave space is provided on the front side thereof, the concave portion One of the upper side rows of the space is provided with an upper and lower first tooth row for defining a distance for adjusting the headrest up and down; wherein the fixing member is detachably disposed on the seat back frame, and comprises a front seat portion and a back cover The front and rear facing portions are configured, wherein the front seat portion has a first sliding groove facing the concave portion of the sliding member, and a side of the first sliding groove is provided with a button groove corresponding to the first tooth row of the sliding member The rear cover portion has a second sliding groove facing the concave portion of the sliding member, so that the sliding member can be vertically slidably disposed on the first sliding groove of the front seat portion and the second sliding portion of the rear cover portion. Between the chutes; wherein the button member is flexible Inserted in the button slot of the fixing member and sandwiched between the seat portion and the sliding member, the button member includes a pressing portion protruding from the front portion of the fixing member for pressing, The convex key portion is integrally disposed on one side of the pressing portion and extends toward the button slot of the fixing member, and an up-and-down button tooth row is integrally disposed on one side of the convex key portion to face the first sliding member The tooth row is adapted to engage or disengage the first tooth row, and the at least one elastic portion is configured to provide an elastic restoring force of the button member after being pressed; wherein when the button member is pressed, the button slot extends into the button slot of the fixing member The at least one elastic portion is compressed and deformed, and the button tooth row of the button member is displaced away from the first tooth row of the sliding member, and the sliding member can be vertically displaced relative to the fixing member to synchronize Adjusting a downward position of the headrest; wherein when the slider is adjusted to a new position and the pressing of the button member is released, the button member is Resetting the elastic restoring force of the at least one elastic portion, the button tooth row of the button member is also reset and re-engaged to a new position on the first tooth row of the sliding member, and the sliding member cannot be opposite to the sliding member. The fixing member moves up and down, and the headrest is positioned at the adjusted new position.

1‧‧‧Adjustment structure

10‧‧‧Sliding parts

10a‧‧‧ front side

11‧‧‧ headrest joint

12‧‧‧ recessed space

13‧‧‧First tooth row

14‧‧‧Second tooth row

20‧‧‧Fixed parts

21‧‧‧ Front seat

22‧‧‧Back cover

23‧‧‧First chute

24‧‧‧ button slot

25‧‧‧Second chute

26‧‧‧stops

27‧‧‧Second spring fixed end

28‧‧‧ Gear slot

30‧‧‧ button pieces

31‧‧‧ Pressing Department

32‧‧‧ convex key

33‧‧‧ button tooth row

34‧‧‧Flexible Department

35‧‧‧Flexible feet

36‧‧‧First spring fixed end

37‧‧‧Compression spring

40‧‧‧ damping gear

50‧‧‧Hooks

60‧‧‧Hooks

2‧‧‧back frame

3‧‧‧ head pillow

1 is a perspective assembled view (rear view) of a headrest fixed to a position in the present invention.

FIG. 2 is a schematic perspective view of the headrest of FIG. 1 being adjusted to move to another higher position. FIG.

3 is a perspective exploded view (front perspective) of an embodiment of the present invention.

Figure 4 is another perspective exploded view of a portion of Figure 3.

Figure 5 is a plan view showing the sliding member in a fixed state in the present invention.

Fig. 6 is a schematic plan view showing the sliding member of Fig. 5 in an adjusted moving state.

Figure 7 is a perspective assembled view (front perspective) of an embodiment of the present invention mounted on a seat back frame.

Figure 8 is a perspective assembled view (front perspective) of another embodiment of the present invention mounted on a seat back frame.

In order to make the present invention more clear and detailed, the preferred embodiment and the following drawings are used to describe the structure and technical features of the present invention as follows: Referring to Figures 1-8, the present invention provides a headrest for a chair 3 The upper and lower adjustment structure 1 is mounted on a back frame 2 such that the headrest 3 can be adjusted up and down relative to the back frame 2 (or the seat back). The adjustment structure 1 mainly includes a sliding member 10 A fixing member 20 and a button member 30.

The sliding member 10 is an elongated body extending upward and downward, and a headrest connecting portion 11 is disposed at an upper end thereof for coupling with the headrest 3. The front side surface 10a is provided with a concave concave space 12 in the concave space 12 On one of the upper side walls, as shown in FIGS. 3 and 4, but without limitation, a first tooth row 13 having a length and a length is provided for defining the movable distance of the headrest 3 when the upper and lower activities are adjusted. 3 and 4; wherein the sliding member 10 comprises a long straight body and a long curved body.

The fixing member 20 is detachably disposed on the seat back frame 2 (described later), and is composed of a front seat portion 21 and a rear cover portion 22 facing forward and backward, wherein the front seat portion 21 has a concave shape and a front direction The first sliding slot 23 of the sliding member 10 is disposed on a side wall of the first sliding slot 23, but the right side wall shown in FIGS. 3 and 4 is not limited, and a button slot 24 is provided to correspond to the sliding member 10. a first tooth row 13; wherein the rear cover portion 22 has a second sliding groove 25 that is concave and faces the sliding member 10; wherein the sliding member 10 is vertically slidably sandwiched between the front seat portion 21 The chute 23 and the second chute 25 of the rear cover portion 22 are shown by arrows A in FIGS. 2, 6, and 8.

The button member 30 is elastically movably embedded on the button slot 24 of the fixing member 20 and sandwiched between the seat portion 21 and the slider 10 before the fixing member 20; the button member 30 includes a pressing portion 31. A convex key portion 32, an up-and-down button tooth row 33 and at least one elastic portion 34.

The pressing portion 31 is exposed outside the seat portion 21 of the fixing member 20 for pressing, as shown by an arrow B in FIGS. 2, 6, and 8; the protruding portion 32 is integrally provided on one side of the pressing portion 31. And extending toward the button slot 24 of the fixing member 20; the upper and lower button tooth rows 33 are integrally formed on one side of the male key portion 32 to be corresponding to the first tooth row 13 of the sliding member 10 Engaged (as shown in FIG. 5) or away from the first row of teeth 13 (shown in FIG. 6); the at least one resilient portion 34 is configured to provide an elastic restoring force of the button member 30 after being pressed.

At least one elastic portion 34 of the button member 30 further includes at least one obliquely projecting bullet The elastic leg 35 is integrally provided on the pressing portion 31 and is on the same side of the pressing portion 31 as the pressing portion 31, and faces the button slot 24 of the fixing member 20. An oblique extension extends to block the stop portion 26 of the front seat portion 21 to form a pressing state to facilitate an increase in the elastic restoring force of the button member 30 after the pressing force is released.

When the slider 10 is adjusted to a new position and the pressing force of the button member 30 is released, the button member 30 is reset by the elastic restoring force of the at least one elastic portion 34 (see FIGS. 1, 5, and 7). The arrow row 33 of the button member 30 is also reset and re-engaged in a new position on the first tooth row 13 of the track member 10, at which time the slider 10 cannot be relative to the The fixing member 20 moves up and down, and the headrest 3 is positioned at the adjusted new position.

A first spring fixing end 36 is further provided on the front end of the convex key portion 32 of the button member 30, but is not limited; wherein the fixing member 20 is further provided with a second spring fixing end 27 to correspond to the first spring fixing end. 36, and a compression spring 37 is disposed between the first and the second spring fixing ends 36, 27, thereby providing a return elastic force of the button member 30 after being pressed, so the compression spring 37 can also be regarded as the at least one elastic Part of part 34.

When the button member 30 is pressed toward the button slot 24 of the fixing member 20 (as indicated by an arrow B in FIGS. 2, 6, and 8), the at least one elastic portion 34 is compressed and deformed, and the button member is compressed. The button row 33 of the 30 is displaced away from the first row 13 of the slider 10, and the slider 10 can be vertically displaced relative to the holder 20 to synchronously adjust the downward position of the headrest 3. (As shown by arrow A in Figures 2, 6, and 8).

On the side wall of the first tooth row 13 of the slider 10, the left side wall shown in FIGS. 3 and 4 is not limited, and a second tooth row 14 is further provided; wherein the first part of the fixing member 20 is A gear groove 28 is further disposed on the side wall of the sliding groove 23 opposite to the button groove 24, but is not limited thereto, and the tooth is A damper gear 40 having a damped rotation function is disposed in the wheel groove 28, and the second tooth row 14 disposed on the sliding member 10 can be correspondingly engaged with the damper gear 40 (as shown in FIG. 4-6). When the slider 10 slides up and down relative to the fixing member 20 (as indicated by an arrow A in FIGS. 2, 6, and 8), the second tooth row 14 of the slider 10 is engaged with the damper gear 40 and The upper and lower sliding (as indicated by an arrow C in FIG. 6) is adopted, so that the sliding member 10 can achieve a stable, smooth damping effect and low noise effect when sliding up and down.

In addition, the upper hook member 50 and the lower hook member 60 are assembled in the fixing member 20 as shown in FIGS. 7 and 8 but are not limited, so that the seat back frame 2 can be clamped to the upper hook member 50 and under the mounting. Between the hook members 60, the headrest 3 is erected above the seat back frame 2; the shape or size of the lower hook member 60 is not limited, and may vary depending on the shape or size of the seat back frame 2. The design, such as the hook member 60a designed to be longer than the hook portion as shown in FIG. 7, or the hook member 60b having the lower hook portion as shown in FIG. 8, is advantageous for the upper and lower adjustment structure 1 of the present invention to be applied. In different seat back frames 2.

The adjustment structure 1 of the present invention has the following advantages as compared with other prior art:

(1) When the button member 30 is pressed, the user can easily adjust the up and down position of the headrest 3, and when the button member 30 is released, the upper and lower positions of the headrest 3 are fixed, which is advantageous for increasing User's convenience of operation.

(2) When the sliding member 10 slides up and down in the fixing member 20, the second tooth row 14 of the sliding member 10 can simultaneously engage and slide on the damping gear 40 of the fixing member 20, It helps to improve the stability and smoothness of the sliding member 10 when sliding up and down and at the same time reduce the sliding noise.

The above description is only a preferred embodiment of the present invention, and is merely illustrative for the present invention. It is to be understood that a person skilled in the art can make various changes, modifications, and even equivalents thereof within the spirit and scope of the invention as defined by the appended claims. Within the scope of protection.

Claims (7)

The upper and lower adjustment structure of the headrest of the chair is mounted on the back frame of the chair to adjust the headrest to move up and down relative to the back frame, and comprises: a sliding member extending upward and downward The upper end is provided with a headrest connecting portion for connecting with the headrest, and a concave space is provided on one side of the concave surface, and one of the upper and lower facing first tooth rows is disposed on one side wall of the concave space; The detachable member is detachably disposed on the seat back frame, and is composed of a front seat portion and a rear cover portion, wherein the front seat portion has a first sliding slot facing the sliding member, and the first sliding slot is a button slot is disposed on a side wall to correspond to the first tooth row of the sliding member; wherein the rear cover portion has a second sliding slot facing the sliding member; wherein the sliding member is slidably mounted on the front seat Between the first sliding groove of the portion and the second sliding groove of the rear cover portion; and a button member elastically movably embedded on the button groove of the fixing member, the method comprising: a pressing portion is exposed The fixing member is used for pressing outside the seat portion; a convex key portion is integrally provided One side of the pressing portion extends toward the button slot of the fixing member; a pair of upper and lower button tooth rows are integrally disposed on one side of the convex key portion for correspondingly engaging or disengaging the first tooth row of the sliding member And at least one elastic portion for providing an elastic restoring force of the button member after being pressed; wherein when the button member is pressed into the button slot of the fixing member, the button tooth row of the button member is displaced Leaving the first row of teeth of the slider to enable the slider to be vertically displaced relative to the fixture to synchronously adjust the downward position of the headrest; wherein when the slider is adjusted to a new position and the button After the pressing of the piece is released, the button member is reset by the elastic restoring force of the at least one elastic portion, and the button tooth row of the button member is also reset and re-engaged in a new position on the first tooth row of the sliding member. Positioning the slider and the headrest in the adjusted new position. The adjustment structure of claim 1, wherein the elastic portion comprises at least one obliquely extending elastic branch The elastic leg is integrally formed on the pressing portion and extends obliquely toward the button groove of the fixing member to block on a stopper portion of the front seat portion to form a pressing state. The adjusting structure according to claim 1, further comprising a first spring fixing end at a front end of the convex key portion of the button member, and a second spring fixing end is disposed on the fixing member to correspond to the first spring The fixing end is provided with a compression spring between the first spring fixing end and the second spring fixing end, thereby providing a return elastic force of the button member after being pressed. The adjustment structure of claim 1 further comprising a second row of teeth on opposite sides of the first row of teeth of the slider. The adjustment structure of claim 4, further comprising a gear groove in the first chute of the fixing member, and a damping gear having a damping function in the gear groove, so that the sliding member slides up and down The second row of teeth can simultaneously engage on the damper gear and slide up and down synchronously. The adjustment structure of claim 1, wherein the fixing member is further assembled with an upper hook member and a lower hook member, so that the seat back frame can be sandwiched between the upper hook member and the lower hook member, thereby erecting the fixing member On the back frame of the chair. The adjustment structure of claim 1, wherein the slider comprises a long straight body and a long arc shape.