JP2017200680A - Airbrush gripped like pencil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbrush gripped like a pencil which enables blowout adjustment of air and a coating material in such sensibility as to write characters with a pencil while gripping a tip side rather than a central portion and easily and precisely spray the air.SOLUTION: Air brush 1 includes: a needle 2 along a central axis C; a needle holder 3 gripping a rear end of the needle 2; a first coating flow channel 5 inside of the needle holder 3; an inner cylinder 6 covering the needle 2; a second coating flow channel 7 between the needle 2 and the inner cylinder 6; an outer cylinder 9 covering the inner cylinder 6; a compressed-air flow channel 12 between the inner cylinder 6 and the outer cylinder 9; a grippable region 15 which an operator can grip; and a lever which is arranged on a front side of the grippable region 15 and moves the inner cylinder 6 to a longitudinal direction. In a stand-by state where the inner cylinder is positioned on the rear part, the first coating flow channel 5, the second coating flow channel 7 and the compressed-air flow channel 12 are sealed, and in a blowout state where the inner cylinder 6 is positioned on the front part, the first coating flow channel 5, the second coating flow channel 7 and the compressed-air flow channel 12 are communicated with outside.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an airbrush that can be gripped like a pencil that enables precise spraying.

  Airbrushes are used in the fields of model production, illustration, nail art and makeup. This airbrush is a kind of painting tool and can be applied over a certain area or sprayed in the form of thin lines or dots (dots). As this airbrush, a pencil-type airbrush particularly considering operability is well known (see, for example, Patent Document 1). As shown in Patent Document 1, an operating rod for adjusting the blowout of air or paint is arranged at a substantially central portion of the main body, which is a long and narrow main body so as to be a pencil type. A cup containing paint is disposed in front of the main body.

  However, since the pencil-type airbrush represented by Patent Document 1 has an operation rod arranged at a substantially central portion of the main body as described above, an operator must operate the central portion of the main body to operate the operation rod. Need to grip. Since the pencil-type airbrush is a pencil-type, it is easier for an operator to grip the tip side than the center portion so as to grip a pencil. However, since the center portion is forced to be held by the arrangement structure of the operation rod, it is difficult to perform precise spraying easily as if writing a character with a pencil. For this reason, the pencil-type airbrush requires skill in its operation.

JP 2004-57839 A

  The present invention takes the above-mentioned conventional art into consideration, and can take advantage of the pencil-type structure to adjust the blowout of air and paint while gripping the tip side from the center portion. An object of the present invention is to provide an airbrush that can be gripped like a pencil that can be easily sprayed with precision as if writing letters.

  In order to achieve the above object, according to the present invention, a central axis in which the front and the rear are defined, a needle having a distal end facing the front along the central axis, and a central axis are arranged along the central axis. A hollow cylindrical needle holder that grips the rear end of the needle at the front end and the rear end is open, and an open rear end of the needle holder that is to be connected to a paint tank filled with paint. A paint-side connecting portion; a first paint passage formed as a space inside the needle holder and communicating with the paint tank via the paint-side connecting portion; and covering the needle and the needle holder; A space between the needle and the needle holder and the inner cylinder, which has a standby state when moved in the front-rear direction and located at the rearmost position and a blowout state when located at the foremost position A second paint flow path, a communication flow path formed through the needle holder to communicate the first paint flow path and the second paint flow path, and covering the inner cylinder An air side to be connected to an outer cylinder, a compressed air passage existing as a space between the inner cylinder and the outer cylinder, and a compressed air tank formed through the outer cylinder and filled with compressed air A connecting part, a grippable area defined as a length from the front end to the rear end of the outer cylinder and formed as an area that can be gripped by an operator, and the inner cylinder disposed on the front side of the grippable area and And a lever for moving the inner cylinder in the front-rear direction, and in the standby state, the first paint flow path and the second paint flow path communicating from the paint tank are sealed. And the compressed air passage leading from the compressed air tank is hermetically sealed. In the blow-out state, the first paint channel and the second paint channel communicating from the paint tank communicate with the outside through the space between the needle and the inner cylinder, and the compression Provided is an airbrush that can be gripped like a pencil, wherein the compressed air flow path communicating from an air tank communicates with the outside through the space between the inner cylinder and the outer cylinder.

  Preferably, the outer cylinder is a split type, and is formed of a front side portion disposed on the front side with respect to the central axis and a rear side portion disposed on the rear side, and the rear side portion is formed on the front side portion. It joins by screwing in, and is integrated with the said inner cylinder with respect to the movement of the front-back direction.

  Preferably, the compressed air flow path has an air retention portion that is in direct communication with the compressed air tank, and a blowout portion that is separated from the air retention portion by a sealing member. On the outer surface of the inner cylinder at a position corresponding to the staying portion, a groove is cut out in the front-rear direction, and in the blowing state, the front end of the groove exceeds the sealing member and the blowing portion The rear end of the groove is disposed in the air retention portion.

  Preferably, the lever is provided with a rotation shaft at a front end located on the front side of the grippable region, and in the standby state, the rear end of the lever is at a position farthest from the outer cylinder, By pushing down the rear end of the lever toward the outer cylinder, the inner cylinder gradually moves forward.

  According to the present invention, by adjusting the lever, the inner cylinder can be moved in the front-rear direction, and the paint can be blown out as a blown-out state. Since this lever is arranged on the front side of the grippable area, it is possible to adjust the blowout of air and paint while grasping the tip side rather than the center part by taking advantage of the structure because it is a pencil type. Precise spraying can be performed easily as if writing with a pencil.

  Moreover, by making the outer cylinder a split type, the inner cylinder can be moved in the front-rear direction by adjusting the screwing depth of the rear side portion. For this reason, the amount of movement of the inner cylinder when the lever is pushed down can be adjusted, and the amount of paint sprayed can be adjusted.

  In addition, by forming a groove on the outer surface of the inner cylinder, compressed air can remain in the air staying part in the standby state, and in the blown state, the air staying part and the blowing part are communicated with each other through the groove. It can be discharged from the blow-out part to the outside through the space between the inner cylinder tip and the outer cylinder tip.

  In addition, since the amount of movement of the inner cylinder can be adjusted by depressing the lever, the lever can be easily operated with the shape of a hand holding a pencil. For this reason, operability is improved.

It is a schematic sectional drawing of the airbrush which can be hold | gripped like the pencil concerning this invention. It is a schematic sectional drawing of the airbrush which can be hold | gripped like the pencil in a standby state. It is a schematic sectional drawing of the airbrush which can be hold | gripped like the pencil in the blowing state. It is a schematic cross-sectional view of the inner cylinder in an air retention part.

  As shown in FIG. 1, an airbrush 1 that can be gripped like a pencil according to the present invention includes a central axis C. The central axis C defines the front-rear direction, that is, the front and rear. A needle 2 is arranged along the central axis C. One end of the needle 2 is sharp, and this sharp side is the tip. The tip of the needle 2 is arranged facing forward. The rear end of the needle 2 is held by a needle holder 3. This needle holder 3 is also arranged along the central axis C, like the needle 2. The needle holder 3 holds the rear end of the needle 2 at its front end. The needle holder 3 is formed as a hollow cylinder having an open rear end.

  The rear end of the needle holder 3 is connected to a paint tank (not shown) via a tube, a tube, or the like. That is, the open rear end of the needle holder 3 functions as the paint-side connection portion 4. The paint tank is filled with paint to be sprayed by the air brush 1. Since the needle holder 3 has a hollow cylindrical shape as described above, the inside thereof is formed as a space. This space is connected to the paint tank via the paint-side connection portion 4. Accordingly, since the paint flows through the needle holder 3, this internal space functions as the first paint flow path 5.

  A part of the front portion of the needle 2 and the needle holder 3 is covered with a substantially cylindrical inner cylinder 6. The inner cylinder 6 is movable in the front-rear direction. The air brush 1 is in a standby state when the inner cylinder 6 is located at the rearmost position, and is in a blow-out state when the inner cylinder 6 is located in the forefront. That is, the paint does not blow out in the standby state, and the paint blows out in the blowout state. The inner cylinder 6 covers the needle 2 and the needle holder 3 with a gap. A space between the needle 2 and needle holder 3 and the inner cylinder 6 is formed as a second paint flow path 7. The needle holder 3 is partially formed with a through hole. The through hole communicates with the first paint channel 5 and the second paint channel 7 as a communication channel 8. Accordingly, the paint in the paint tank flows into the first paint flow in the needle holder 3 from the paint-side connection portion 4 to 5, passes through the communication flow path 8, and passes through the second paint flow path 7 to the tip of the needle 2. Circulate to the side.

  On the other hand, the inner cylinder 6 is covered with an outer cylinder 9. In the example of FIG. 1, the outer cylinder 9 is formed by screwing four members, and has a most distal end portion 9 a located on the most distal end side, and sequentially from the most distal end portion 9 a toward the rear side. An air portion 9b, a lever portion 9c, and a rear side portion 11 are formed. In addition, the front side part 10 is formed by the most advanced part 9a, the air part 9b, and the lever part 9c. Here, in the example of the figure, the inner cylinder 6 has a double cylinder structure, and is formed by an inner cylinder inner portion 6a and an inner cylinder outer portion 6b. The rear side portion 11 is integrated with respect to the movement in the front-rear direction with respect to the inner cylinder inner portion 6a.

  A compressed air flow path 12 as a space is formed between the inner cylinder 6 and the outer cylinder 9. A through hole is formed in the outer cylinder 9 (air portion 9b in the example in the figure), and this through hole functions as an air side connecting portion 13 and a compressed air flow path via a connecting tube 14 such as a tube or a hose. 12 communicates with a compressed air tank (not shown). That is, the compressed air tank is filled with compressed air, and the compressed air flows into the compressed air flow path 12 from the air side connection portion 13 through the connection pipe 14.

  As described above, the outer cylinder 9 is formed by the front side portion 10 (the most advanced portion 9a, the air portion 9b, the lever portion 9c) and the rear side portion 11 which are connected to each other by screwing in the front-rear direction. The length from the front end to the rear end of the outer cylinder 9 (that is, from the front end of the front side portion 10 to the rear end of the rear side portion 11) is a region that can be gripped by an operator, and this region is defined as a grippable region 15. Has been. That is, the outer shape of the airbrush 1 is defined by the shape of the outer cylinder 9 located on the outermost side, and since the outer cylinder 9 has a long cylindrical shape, the airbrush 1 can be said to be a so-called pencil type. Since it is a pencil type, the operator can hold the pencil so as to hold a pencil at an arbitrary position from the front to the rear of the airbrush 1. However, in the airbrush 1 according to the present invention, a lever 17 for moving the inner cylinder 6 in the front-rear direction is disposed on the front side of the grippable region 15. This lever 16 is connected to the inner cylinder 6 for adjusting the amount of paint sprayed. Therefore, the operator holds the front side of the airbrush 1, that is, the front side similar to a pencil.

  Thus, by adjusting the lever 17, the inner cylinder 6 can be moved in the front-rear direction, and the paint can be blown out as a blown-out state. Since the lever 17 is arranged on the front side of the grippable region 15, the operator makes use of a pencil-type structure and adjusts the blowout of air and paint while gripping the tip side of the center portion. Therefore, precise spraying can be performed easily as if writing a character with a pencil. That is, as if a familiar pencil is held and a character is written, the airbrush 1 can be held with a natural way of holding and the lever 17 can be adjusted. The operation does not require skill. Even beginners can easily and easily enjoy painting with an airbrush.

  Next, the operation until the paint is blown out by the operation of the lever 17 will be described. The lever 17 extends along the front-rear direction of the grippable region 15, that is, along the front-rear direction of the airbrush 1, and a rotation shaft 18 is disposed at the front end located on the front side. As shown in FIG. 2, the rear end of the lever 17 is at a position farthest from the outer cylinder 9 in a standby state where the paint does not blow out. At this time, the first paint flow path 5 and the second paint flow path 7 communicating from the paint tank are sealed, and the compressed air flow path 12 communicating from the compressed air tank is also sealed. Specifically, the space between the needle 2 and the inner cylinder 6 (inner cylinder inner portion 6a in the illustrated example) is closed on the front end side. For this reason, it is in the state sealed from the 1st coating material channel 5 to the 2nd coating material channel 7. Further, as a part of the compressed air flow path 12, the air retaining portion 19 is formed by recessing the inside of the air portion 9 b. That is, the air retention part 19 is in direct communication with the compressed air tank. The air retention space 19 is sealed in the standby state because the air flow is blocked by a sealing member 22 such as an O-ring arranged in the front-rear direction. Therefore, in the standby state, both the paint and the air remain in the sealed space, and the paint does not blow out from the tip of the air brush 1. A blow-out portion 24 as a space separated by the sealing member 22 is formed in front of the air retention portion 19. Therefore, the compressed air flow path 12 is formed by the air staying part 19 and the blowing part 24.

  The operator grips the airbrush 1 as if it had a pencil, and pushes the rear end of the lever 17 toward the outer cylinder 9 as shown in FIG. 3, whereby the inner cylinder 6 gradually moves forward. Specifically, the lever 17 is provided with a bifurcated fork 20 extending inside the outer cylinder 9, and the bifurcated fork 20 is formed in a notch 21 formed on the outer surface of the inner cylinder 6 (inner cylinder outer portion 6b in this example). Is engaged. The notch 21 may be formed through the inner cylinder 6 (inner cylinder outer portion 6b). When the lever 17 is pushed down, the fork 20 pushes the notch 21 forward. Therefore, the inner cylinder 6 moves forward. When the inner cylinder 6 moves forward, a gap is generated in the front end side portion between the needle 2 and the inner cylinder 6 that have been blocked in the standby state. That is, in the blown-out state, the first paint flow path 5 and the second paint flow path 7 communicated from the paint tank communicate with the outside through a gap formed in the front end side portion between the needle 2 and the inner cylinder 6. The inner cylinder outer portion 6 b is always urged rearward by the spring 27. The inner cylinder inner portion 6a is always urged rearward by the spring 28. The push-down operation by the lever 17 is an operation performed against these springs 27 and 28.

  On the other hand, as shown in FIG. 2 and FIG. 4, the position corresponding to the air retention portion 19 in the standby state and on the surface of the inner cylinder 6 (inner cylinder outer portion 6 b in the example in the figure) The groove 23 is cut out. In the standby state, the groove 23 functions as a part of the air staying portion 19, so that the compressed air stays in the groove 23. When the lever 17 is pushed down, the inner cylinder 6 moves forward, so that the groove 23 moves forward beyond the sealing member 22. In the blowing state in which the lever 17 is completely pushed down, the front end of the groove 23 is exposed to the blowing portion 24 beyond the sealing member 22. The rear end of the groove 23 is in a state of being arranged in the air retention part 19. That is, the compressed air flow path 12 communicated from the compressed air tank communicates with the outside through the space between the inner cylinder 6 and the outer cylinder 9. Thereby, in the blowing state, the compressed air flows from the air staying portion 19 through the groove 23 and flows into the blowing portion 24. The compressed air circulates forward through the blowing part 24 as it is, and is blown to the outside from the tip portion between the inner cylinder 6 and the outer cylinder 9.

  At this time, a nozzle member 25 protruding inward is disposed inside the outer cylinder 9 (the most advanced portion 9a in the illustrated example), and the interval between the nozzle member 25 and the inner cylinder 6 is narrow. ing. Compressed air blows out vigorously from this narrow gap. At this time, a negative pressure is generated in the gap on the tip side between the needle 2 and the inner cylinder 6 adjacent to the gap, and the paint in the gap is attracted by the compressed air and blown out together with the compressed air. With the above configuration, when the lever 17 is pushed down, the paint is blown out together with the compressed air. The clearance on the distal end side between the outer cylinder 9 and the inner cylinder 6 and the clearance on the distal end side between the inner cylinder 6 and the needle 2 can be adjusted by the amount of depression of the lever 17. As described above, since the amount of movement of the inner cylinder 6 can be adjusted by depressing the lever 17, the lever 17 can be easily operated with the shape of a hand holding a pencil. For this reason, operability is improved.

  Further, by forming the groove 23 on the outer surface of the inner cylinder 6, the compressed air can remain in the air staying part 19 in the standby state, and the air staying part 19 and the blowout part 24 are connected through the groove 23 in the blowing state. Compressed air can be discharged to the outside through the space between the tip of the inner cylinder 6 and the tip of the outer cylinder 9 by communicating with each other.

  As shown in FIGS. 1 and 2, a front end surface of the inner cylinder outer portion 6b and an abutting surface that abuts against this surface are formed on the inner cylinder inner portion 6a, and a play gap 26 is formed between them in a standby state. May be provided. By providing the play gap 26, when the lever 17 is pushed down, only the inner cylinder outer portion 6b engaged with the lever 17 moves freely by the length of the play gap 26. As described above, since the groove 23 is formed on the outer surface of the inner cylinder outer portion 6b, the groove 23 moves forward along with this, and only the compressed air is blown out forward of the air brush 1. At this time, since the inner cylinder inner portion 6a has not moved forward, the paint does not blow out. In this manner, by providing the play gap 26, it is possible to form a region where only the compressed air is blown out by pushing down the lever 17. Thereby, it is possible to prevent the paint from being suddenly blown out by the depression of the lever 17 and to prevent the erroneous paint from being blown out.

  Here, as described above, the outer cylinder 9 is of a split type, and may be formed of the front side portion 10 disposed on the front side with respect to the central axis C and the rear side portion 11 disposed on the rear side. The rear side portion 11 is joined to the front side portion 10 by screwing, and is integrated with the inner cylinder 6 (inner cylinder inner portion 6a in the illustrated example) with respect to movement in the front-rear direction. Specifically, the front end surface of the rear side portion 11 and the rear end surface of the inner cylinder inner portion 6a are in close contact with each other. When the rear side portion 11 is rotated and screwed into the front side portion 10, the inner cylinder inner side portion 6 a slides forward against the spring 28. When the rear side portion 11 is rotated in the reverse direction, the inner cylinder inner portion 6 a is moved backward by the spring 28. On the other hand, the rear side portion 11 is also integrated with the needle holder 3. Since this integration is structurally integrated, the needle holder 3 rotates in the same manner as the rear side portion 11 is rotated by screwing. When the rear side portion 11 is screwed in a maximum amount with the lever 17 raised (there is no gap between the tip of the needle 2 and the tip of the inner tube inner portion 6a), the inner tube inner portion 6a is moved accordingly. The needle holder 3 (needle 2) rotates and moves forward to reach the foremost end. This state is a state where there is no space for the inner cylinder inner portion 6a to move further forward even if the lever 17 is pushed down. That is, in this state, even if the lever 17 is pushed down, the compressed air is blown out and the paint is not blown out. By moving the rear side portion 11 little by little rearward, the amount of movement of the inner cylinder inner portion 6a due to the pressing operation of the lever 17 can be increased. That is, the amount of paint sprayed can be increased little by little by moving the rear side portion 11 rearward little by little. This makes it possible to adjust the amount of paint sprayed separately from the adjustment by the lever 17.

1: Airbrush that can be gripped like a pencil, 2: Needle, 3: Needle holder, 4: Paint side connection part, 5: First paint channel, 6: Inner cylinder, 6a: Inner cylinder inner part, 6b: Inner Tube outer portion, 7: second paint channel, 8: communication channel, 9: outer tube, 9a: most advanced portion, 9b: air portion, 9c: lever portion, 10: front side portion, 11: rear side portion , 12: compressed air flow path, 13: air side connection portion, 14: connection pipe, 15: grippable region, 17: lever, 18: rotating shaft, 19: air retention portion, 20: bifurcated fork, 21: notch , 22: sealing member, 23: groove, 24: blowing part, 25: nozzle member, 26: play gap, 27: spring, 28: spring, C: central axis

Claims (4)

A central axis defining the front and the rear;
A needle that is disposed with its tip facing forward along the central axis;
A hollow cylindrical needle holder that is arranged along the central axis and grips the rear end of the needle at the front end and the rear end is open;
A paint side connection disposed at the rear end of the needle holder to be connected to a paint tank filled with paint;
A first paint channel formed as a space inside the needle holder and to be communicated with the paint tank via the paint-side connection portion;
An inner cylinder that covers the needle and the needle holder and has a standby state when moved in the front-rear direction and positioned at the rearmost position and a blow-out state when positioned at the frontmost position;
A second paint channel existing as a space between the needle and the needle holder and the inner cylinder;
A communication channel formed through the needle holder to communicate the first paint channel and the second paint channel;
An outer cylinder covering the inner cylinder;
A compressed air passage existing as a space between the inner cylinder and the outer cylinder;
An air-side connection portion to be connected to a compressed air tank formed through the outer cylinder and filled with compressed air;
A grippable area defined as a length that is defined as a length from the front end to the rear end of the outer cylinder and can be gripped by an operator; and
A lever arranged on the front side of the grippable region and connected to the inner cylinder to move the inner cylinder in the front-rear direction;
In the standby state, the first paint flow path and the second paint flow path leading from the paint tank are sealed, and the compressed air flow path leading from the compressed air tank is sealed,
In the blow-out state, the first paint flow path and the second paint flow path communicating from the paint tank communicate with the outside through the space between the needle and the inner cylinder, and communicate with the compressed air tank. An airbrush that can be gripped like a pencil, wherein the compressed air flow path communicates with the outside through the space between the inner cylinder and the outer cylinder. The outer cylinder is a split type, and is formed of a front side portion arranged on the front side with respect to the central axis and a rear side portion arranged on the rear side,
2. The pencil according to claim 1, wherein the rear side portion is joined to the front side portion by screwing, and is integrated with the inner cylinder with respect to movement in the front-rear direction. Airbrush that can be gripped like The compressed air flow path has an air retention portion that is in direct communication with the compressed air tank, and a blowout portion that is separated from the air retention portion by a sealing member,
In the standby state, on the outer surface of the inner cylinder at a position corresponding to the air retention portion, a groove extending in the front-rear direction is cut out,
2. The front end of the groove is exposed to the blow-out portion over the sealing member in the blow-out state, and the rear end of the groove is disposed in the air retention portion. Airbrush that can be gripped like a pencil. The lever is provided with a rotation shaft at a front end located on the front side of the grippable region,
In the standby state, the rear end of the lever is at a position farthest away from the outer cylinder,
2. The airbrush that can be gripped like a pencil according to claim 1, wherein the inner cylinder gradually moves forward by pushing down the rear end of the lever toward the outer cylinder.

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