Button mounting mechanism

Abstract

The present invention provides a button mounting mechanism that can maintain the holding force on the button component in its initial state while suppressing wear on the holding part, mounting part, button component, etc. [Solution] The invention relates to a button attachment mechanism 10 for attaching a button member 1 to a fabric, and the button attachment mechanism comprises a pair of first holding parts 20 for holding a button member between them, the first holding parts being displaceable in a closing direction for holding the button member and in an opening direction for releasing the holding of the button member, a first elastic member 29 for biasing the first holding parts in the closing direction, a biasing adding part 30 that can bias the first holding parts in the closing direction in addition to the biasing of the first holding parts in the closing direction by the first elastic member, and a moving part 40 for moving the button member to the attachment position on the fabric, wherein the moving part releases or reduces the biasing of the first holding parts by the biasing adding part 30 during movement to the attachment position, and displaces the first holding parts, from which the biasing by the biasing adding part has been released or reduced, in the opening direction.

Description

Technical Field

[0001] The present invention relates to a button attachment mechanism, and more particularly to a button attachment mechanism for attaching the body of a snap button to a fabric by means of an attachment member or the like.

Background Art

[0002] When attaching the body of a snap button to a fabric such as clothing by means of an attachment member, generally, the snap button is held by an upper die, the attachment member is held by a lower die, the fabric is placed on the lower die, and then the upper die and the lower die are actuated. As a result, a part of the attachment member penetrates the fabric upward and is clamped to the snap button.

[0003] The lower die includes a pair of holding portions, a spring that biases these holding portions in a closing direction in which they approach each other, and a moving portion. The attachment member is held between the pair of holding portions that are biased in the closing direction by the spring. When the lower die is actuated, the moving portion rises, displacing the pair of holding portions in an opening direction in which they move away from each other against the biasing force of the spring, thereby releasing the holding of the attachment member by the holding portions. This attachment member is conveyed by the moving portion to the attachment position on the fabric.

[0004] In the above-described lower die, the moving portion displaces the pair of holding portions in the opening direction against the biasing force of the spring while contacting the tapered surfaces of each holding portion. As a result, the holding of the attachment member by the holding portions is released, but at the time of this release of holding, the holding portions, the moving portion, the attachment member, etc. come into contact with each other. Repeated such contact causes wear of the holding portions, the moving portion, the attachment member, etc. Therefore, it is necessary to perform cleaning regularly, and it is also necessary to repair, replace, etc. the holding portions, the moving portion, etc. in order to avoid operation failures due to wear and deterioration.

[0005] In order to reduce the above-described wear, it is conceivable to weaken the biasing force of the spring and reduce the force for displacing the pair of holding portions in the opening direction against the biasing force of the spring. However, in this case, the holding force in the initial state for initially holding the attachment member between the pair of holding portions is insufficient, and the posture of the attachment member may become unstable, such as the attachment member tilting. [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a button mounting mechanism that can suppress wear of the holding part, mounting part, button member, etc., while maintaining the holding force on the button member in its initial state. [Means for solving the problem]

[0007] To solve the above problems, the present invention provides a button attachment mechanism for attaching a button member to fabric, A pair of first holding parts for holding the button member between them, the first holding parts being displaceable in a closing direction for holding the button member and in an opening direction for releasing the button member, A first elastic member that biases the first holding portion in the closing direction, In addition to the biasing of the first retaining portion in the closing direction by the first elastic member, a biasing adding portion capable of biasing the first retaining portion in the closing direction is provided. The system includes a moving part that moves the button member to the attachment position on the fabric, The provided button mounting mechanism includes a movable part that releases or reduces the biasing of the first retaining part by the biasing part during movement to the mounting position, and displaces the first retaining part, from which the biasing by the biasing part has been released or reduced, in the opening direction.

[0008] In the present invention, the button component is a button such as a snap button attached to the fabric of clothing, a button body, an attachment member, etc. In this specification, attachment members are mainly given as examples of button components, but the invention is not limited thereto.

[0009] In the button mounting mechanism according to the present invention, the button member is held between a pair of first retaining parts in the initial state. At this time, the first retaining parts are biased in the closing direction by a first elastic member and also by a biasing-adding part. Therefore, the force with which the button member is held by the first retaining parts in the initial state is the sum of the force F1 with which the first elastic member biases the first retaining parts in the closing direction and the force F2 with which the biasing-adding part biases the first retaining parts in the closing direction, F1 + F2. If the force with which the button member is held in the initial state is insufficient, the position of the button member may become unstable, so the holding force on the button member in the initial state is set to a certain level or higher.

[0010] In the initial state, if the holding force on the button member is F(N), then F(N) is the sum of the force F1 that the first elastic member exerts on the first retaining part in the closing direction and the force F2 that the biasing part exerts on the first retaining part in the closing direction (F(N)=F1+F2). In this invention, the holding force F on the button member in the initial state can be divided into F1 and F2. Furthermore, in this specification, the force that biases the first retaining part in the closing direction and the force that the first retaining part exerts on the button member are substantially the same. To make the explanation easier to understand, in the initial state, the force that the first elastic member exerts on the first retaining part in the closing direction is defined as the first force F1=1 / 2F(N), and the force that the biasing part exerts on the first retaining part in the closing direction is defined as the second force F2=1 / 2F(N).

[0011] The movable part moves from its initial position to the mounting position of the button member. During this movement, the movable part releases the biasing force applied to the first retaining part by the biasing force application part (first release step), and then displaces the first retaining part in the opening direction against the biasing force applied by the first elastic member (second release step). In the first release step, the biasing force applied to the first retaining part by the biasing force application part is released. Note that this release of biasing force is not complete, but only needs to be reduced to a certain extent. As the second force F2 is released in the first release step, the button member is held only by the first force F1, and the holding force on the button member is reduced from the initial state F(N) to 1 / 2F(N).

[0012] Next, in the second release step, the movable part displaces the first holding part in the opening direction, thereby releasing the first holding part from holding the button member. As a result, the holding force on the button member becomes 0 (N). In the second release step, the only force resisting the movable part's displacement of the first holding part in the opening direction is the first force F1 (1 / 2F (N)). Therefore, even if the first holding part, movable part, button member, etc. come into contact with each other in the second release step, wear caused by this contact can be suppressed.

[0013] In one embodiment of the present invention, the biasing portion includes a pair of second holding portions that are displaceable between a first position for holding the first holding portion and a second position for releasing the first holding portion, and a second elastic member that biases the second holding portions to the first position. In this embodiment, the first holding portion that holds the button member is held between a pair of second holding portions that are biased to the first position by the second elastic member. The force with which the second holding portions hold the first holding portion due to the biasing of the second elastic member is the second force F2 described above. Furthermore, in the first release step described above, the moving portion displaces the second holding portions from the first position to the second position against the biasing of the second elastic member. This releases the second force F2. In one embodiment of the present invention, the second holding portion has a pressing portion that presses against the opening side surface of the first holding portion (the left and right outer surfaces of the first holding portion 20 in Figure 2, etc.) in the first position. The retaining portion separates from the opening-side surface of the first retaining portion when the second retaining portion is displaced from the first position to the second position.

[0014] In one embodiment of the present invention, the second retaining portion has a contact portion that is positioned within the movement path of the moving portion at the first position and is capable of contacting the moving portion. The moving portion contacts the contact portion, displacing the second retaining portion from the first position to the second position, and the contact portion moves out of the movement path at the second position. The moving portion moves from the initial position to the mounting position of the button member, but in this embodiment, the contact portion of the second retaining portion is inside the movement path of the moving portion at the first position. As a result, the moving portion, while in motion, contacts the contact portion of the second retaining portion which is inside the movement path in the first release step, pushing the contact portion away to the second position outside the movement path. This causes the second elastic member to be displaced from the first position to the second position.

[0015] In one embodiment of the present invention, the second holding portion has a first shaft portion, and the moving portion contacts the second holding portion and displaces the second holding portion from the first position to the second position around the first shaft portion. In this embodiment, the moving portion, while in motion, contacts the second holding portion which is in the first position during the first release step, thereby causing the second holding portion to rotate around the first shaft portion and displace from the first position to the second position.

[0016] In one embodiment of the present invention, the second holding portion has a rotating member that rotates by friction with the moving portion, and the contact portion is a part of the rotating member. In this embodiment, during the first release step, the moving portion in motion contacts the contact portion of the rotating member located within the movement path, pushing the rotating member out of the movement path and displacing the second holding portion to a second position. At this time, the rotating member rotates by friction with the moving portion. By providing such a rotating member, the displacement of the second holding portion from a first position to a second position can be made smooth. In one embodiment of the present invention, the second holding portion has a second shaft portion, and the rotating member rotates around the second shaft portion.

[0017] In one embodiment of the present invention, the second holding portion has a first shaft portion, and the moving portion contacts the second holding portion and displaces the second holding portion from a first position to a second position around the first shaft portion, and the contact portion is positioned downstream of the first shaft portion in the movement path of the moving portion. The moving portion moves along the movement path from an initial position upstream to a mounting position downstream (upward in Figures 1-6). The contact portion of the rotating member including the second shaft portion is positioned downstream of the first shaft portion in the movement path. [Effects of the Invention]

[0018] In this invention, in the initial state when the button member is first held by the first retaining part, the force with which the button member is held by the first retaining part is the sum of the force exerted by the first elastic member to bias the first retaining part in the closing direction and the force exerted by the biasing-adding part to bias the first retaining part in the closing direction. The moving part then releases the biasing of the first retaining part by the biasing-adding part and subsequently displaces the first retaining part in the opening direction against the biasing of the first elastic member. As a result, the force required by the moving part to displace the first retaining part in the opening direction is reduced from the initial state. Therefore, even if the first retaining part, moving part, button member, etc. come into contact with each other, wear caused by this contact can be suppressed. [Brief explanation of the drawing]

[0019] [Figure 1] Figure 1 is a cross-sectional view of a button mounting mechanism according to the first embodiment of the present invention, showing the initial state of the button mounting mechanism. [Figure 2] Figure 2 is a magnified view of a portion of Figure 1. [Figure 3] Figure 3 is a cross-sectional view of the button mounting mechanism in a state where the movable part has released the first holding part from being held by the biasing part. [Figure 4] Figure 4 is a magnified view of a portion of Figure 3. [Figure 5] Figure 5 is a cross-sectional view of the button mounting mechanism in a state where the movable part has released its hold from the first holding part and moved the mounting member to the mounting position. [Figure 6] Figure 6 is a magnified view of a portion of Figure 5. [Figure 7]FIG. 7 is a cross-sectional view similar to FIG. 2 showing the initial state of the button attachment mechanism according to the second embodiment of the present invention. [Figure 8] FIG. 8 is a cross-sectional view similar to FIG. 4 showing a state where the holding of the first holding portion by the urging addition portion of the moving portion is released. [Figure 9] FIG. 9 is a cross-sectional view of an attachment member which is an example of the button member. [Figure 10] FIG. 10 is a cross-sectional view showing another example of the button member. [Figure 11] FIG. 11 is a cross-sectional view showing another example of the button member. [Figure 12] FIG. 12 is a cross-sectional view showing another example of the button member. [Figure 13] FIG. 13 is a cross-sectional view showing another example of the button member.

MODE FOR CARRYING OUT THE INVENTION

[0020] Hereinafter, although some embodiments of the present invention will be described based on the drawings, the present invention is not limited to such embodiments. FIG. 1 is a cross-sectional view of a button attachment mechanism 10 according to the first embodiment of the present invention, showing the initial state of the button attachment mechanism 10. FIG. 2 is a partial enlarged view of FIG. 1. The button attachment mechanism 10 can be mounted, for example, on a lower die on the side that holds the attachment member of the snap button in a snap button automatic attachment machine. In this case, the main body of the snap button is supplied and held by the upper die of the snap button automatic attachment machine.

[0021] Hereinafter, the vertical and horizontal directions of the button attachment mechanism 10 shall be based on FIGS. 1 to 6 and the like. The upper side is the downstream in the movement path of the moving portion 40 described later. Further, hereinafter, as the button member attached to the fabric f by the button attachment mechanism 10, the attachment member 1 shown in FIG. 9 will be described as an example. Other examples of the button member will be described later.

[0022] The button attachment mechanism 10 includes a support part 11 for supporting the fabric f, a pair of left and right first holding parts 20 for holding the attachment member 1 between them, a first elastic member 29 (shown only in Figure 2) that biases the left and right first holding parts 20 in the closing direction (inward in the left-right direction) for holding the attachment member 1, a biasing part 30 that can bias the first holding parts 20 in the closing direction in addition to the biasing of the first holding parts 20 by the first elastic member 29, and a moving part 40 that moves the attachment member 1 to the attachment position on the fabric f (see Figure 6, etc.). The left and right first holding parts 20 can be displaced in the opening direction (outward in the left-right direction) against the biasing of the first elastic member 29, as will be described in detail later, and the displacement in the opening direction releases the attachment member 1. The first elastic member 29 and the second elastic member 39, which will be described later, can be springs, rubber, etc.

[0023] The movable part 40 is a smaller diameter portion that extends concentrically upward from a cylindrical large diameter portion 41. The large diameter portion 41 is housed in a housing 50 and moves up and down within the housing 50 by a drive unit (not shown), causing the movable part 40 to move up and down accordingly. A guide stopper 13 is connected to the upper end of the housing 50. The guide stopper 13 guides the vertical movement of the movable part 40 concentrically with the housing 50 and restricts the upward movement of the movable part 40. Front and rear side portions 12 are provided above the guide stopper 13. The first holding portion 20 is positioned on the front and rear side portions 12, and the support portion 11 is positioned on the first holding portion 20. The support portion 11 does not displace in the left and right directions. The biasing portion 30, except for the pressing portion 33 which will be described later, is positioned below the first holding portion 20.

[0024] Each first retaining portion 20 has a vertical surface 21 and a tapered surface 22 that slopes downward from the vertical surface 21, on its inward side in the left-right direction. The vertical surface 21 is aligned in the vertical direction. The tapered surface 22 is inclined such that the distance between the left and right first retaining portions 20 gradually increases downward. The vertical surface 21 and the tapered surface 22 may be arc-shaped or curved in a horizontal plane perpendicular to the vertical direction. A groove 23 is formed near the tapered surface 22 on each vertical surface 21 to partially receive the base 1a of the mounting member 1. The left and right first retaining portions 20 are biased in the closing direction by the first elastic member 29, and the mounting member 1 is held between the left and right first retaining portions 20 while receiving the base 1a of the mounting member 1 in the groove 23.

[0025] The biasing attachment section 30 comprises a pair of left and right second holding sections 31 and a second elastic member 39. The left and right second holding sections 31 hold the left and right first holding sections 20 that hold the mounting member 1 in a first position and release the holding of the first holding sections 20 in a second position. The second elastic member 39 biases the left and right second holding sections 31 to the first position, thereby causing the second holding sections 31 to hold the first holding sections in the first position. The second holding sections 31 can be displaced to a second position against the biasing force of the second elastic member 39, as will be described in more detail later, and the displacement to the second position releases the holding of the first holding sections 20.

[0026] Each second holding portion 31 rotates around the first shaft portion 32 and is displaced between a first position and a second position. The first shaft portion 32 is supported by the front and rear side portions 12. Each second holding portion 31 also has a pressing portion 33 that presses against the left and right outer surfaces (opening direction sides) of each first holding portion 20 in the first position. The pressing portion 33 separates from the first holding portion 20 in the second position. Furthermore, each second holding portion 31 has a roller 34 as a rotating member. The roller 34 is rotatable around the second shaft portion 35 supported by the second holding portion 31. The roller 34 includes a contact portion 34a that enters the movement path of the movable portion 40 in the first position of the second holding portion 31.

[0027] Referring to Figure 9, the mounting member 1 is a metal member having an annular base 1a and a plurality of pins 1b protruding from the base 1a. In this example, there are five pins 1b, but this is not limited to five. The mounting member 1 is for attaching the body of a snap button (not shown) to the fabric f.

[0028] Initial state In the initial state of the button mounting mechanism 10 shown in Figures 1 and 2, the first holding part 20 is biased in the closing direction by the first elastic member 29 and holds the mounting member 1. In this state, the first holding part 20 is also biased in the closing direction and held by the biasing addition part 30. That is, the second holding part 31 is biased to the first position by the second elastic member 39 and holds the first holding part 20 by the pressing part 33. As a result, the force F that holds the mounting member 1 in the first holding part 20 in the initial state is the sum of the force F1 that the first elastic member 29 exerts on the first holding part 20 in the closing direction and the force F2 that the second elastic member 39 of the biasing addition part 30 exerts on the first holding part 20 in the closing direction via the second holding part 31 (F1 + F2). Also, in the initial state, the movable part 40 is in its lowest initial position.

[0029] Release of biasing force by the biasing force application unit (first release step) Figure 3 is a cross-sectional view of the button mounting mechanism 10 in the state where the movable part 40 has released the hold of the first holding part 20 by the biasing part 30. Figure 4 is a partially enlarged view of Figure 3. When the movable part 40 rises from its initial position, it comes into contact with the contact portion 34a of the roller 34 of the second holding part 31, which is in the movement path of the movable part 40, and pushes the contact portion 34a out of the movement path. The movable part 40 comes into contact with the contact portion 34a just before it comes into contact with the tapered surface 22 of the first holding part 20. This moves the contact portion 34a out of the movement path. As a result, the left and right second holding parts 31 rotate and displace from the first position to the second position around the first shaft part 32 against the biasing force of the second elastic member 39, and release the hold of the first holding part 20. As a result, the biasing and holding of the first holding part by the biasing part 30 is released. Therefore, at this point, the mounting member 1 is held only by the force F1 that biases the first holding portion 20 in the closing direction by the first elastic member 29.

[0030] In the first embodiment, when the moving part 40 pushes the contact portion 34a of the roller 34 out of the movement path, the friction between the moving part 40 and the roller 34 causes the roller 34 to rotate around the second shaft portion 35. This makes the displacement of the second holding portion 31 from the first position to the second position smoother.

[0031] Figures 3 and 4 show the point at which the movable part 40 displaces the second holding part 31 to the second position and rises further, contacting the tapered surface 22 of the first holding part 20.

[0032] Release of the holding mechanism by the first holding part (second release step) Figure 5 is a cross-sectional view of the button mounting mechanism 10 in the state where the movable part 40 has released its hold from the first holding part 20 and moved the mounting member 1 to the mounting position. Figure 6 is a partially enlarged view of Figure 5. As the movable part 40, which has released its biasing from the biasing part 30, rises further, it contacts the tapered surface 22 of the first holding part 20 and displaces the left and right first holding parts 20 in the opening direction against the biasing of the first elastic member 29. As a result, the holding of the mounting member 1 by the first holding part 20 is released, and the mounting member 1 rests on the top surface of the movable part 40 and is transported to the mounting position. The force that the movable part 40 has to resist in order to displace the first holding part 20 in the opening direction is only the force F1 that the first elastic member 29 biases the first holding part 20, since the biasing force F2 of the biasing part 30 has been released. In this way, the force required for the movable part 40 to displace the first holding part 20 in the opening direction has been reduced from the initial state of F1 + F2 to F1. Therefore, even if the first holding part 20, the movable part 40, the mounting member 1, etc. come into contact with each other when releasing the first holding part 20, wear caused by this can be suppressed.

[0033] The mounting member 1 is transported to the mounting position by the moving part 40, which has released its hold from the first holding part 20. There, the pin 1b of the mounting member 1 penetrates the fabric f upwards, and is then crimped by the upper die 60 to attach it to the fabric f.

[0034] In the first embodiment described above, when the moving part 40 displaces the second holding part 31 from the first position to the second position, it contacts the contact portion 34a of the roller 34 and pushes the second holding part 31 out of the movement path, and at this time the roller 34 rotates due to friction with the moving part 40. However, in the present invention, the second holding part may be displaced from the first position to the second position without the roller or the like rotating, and this point will be explained next.

[0035] Figure 7 is a cross-sectional view similar to Figure 2, showing the initial state of the button mounting mechanism 10A according to the second embodiment of the present invention. In the button mounting mechanism 10A of the second embodiment and the button mounting mechanism of the first embodiment, the configurations other than the biasing parts 30A and 30 are the same, and the first shaft portion 32 and pressing portion 33 of the biasing parts 30A and 30 are also common, so the same reference numerals are used. The biasing part 30A of the button mounting mechanism 10A includes left and right second holding portions 31A. Each second holding portion 31A does not have a roller 34 and has a contact portion 34b that enters the movement path of the moving portion 120 in the first position in the initial state.

[0036] Figure 8 is a cross-sectional view similar to Figure 4, showing the state in which the movable part 40 has released the hold of the first holding part 20 by the biasing part 30A. When the movable part 40 rises from its initial position, it comes into contact with the contact part 34b that is in the movement path of the movable part 40, pushing the contact part 34b out of the movement path. The movable part 40 comes into contact with the contact part 34b just before it comes into contact with the tapered surface 22 of the first holding part 20. This moves the contact part 34b out of the movement path. As a result, the left and right second holding parts 31A rotate and displace from the first position to the second position around the first shaft part 32 against the biasing force of the second elastic member 39, releasing the hold of the first holding part 20. Next, the movable part 40 releases the hold of the first holding part 20, as in the first embodiment, and transports the mounting member 1 to the mounting position.

[0037] Figures 10 to 13 are cross-sectional views showing other examples of mounting members that are button components. Mounting member 2 in Figure 10 has an annular base 2a and a plurality of pins 2b protruding from the base 2a. The base 2a is constructed by covering the base ends of the pins 2b with a cover member. Mounting member 3 in Figure 11 has a disc-shaped base 3a and a single cylindrical pin 3b protruding from the base 3a. Mounting member 4 in Figure 12 has a substantially disc-shaped base 4a and a single cylindrical pin 4b protruding from the base 4a. The base 4a is constructed by covering the base end of the pin 4b with a cover member. Mounting member 5 in Figure 13 has a disc-shaped base 5a and a single cylindrical or columnar pin 5b protruding from the base 5a. Mounting members 2 to 5 are attached to the fabric by button mounting mechanisms 10 and 10A, similar to mounting member 1. [Explanation of symbols]

[0038] 1, 2, 3, 4, 5 Button components (mounting components) 10, 10A Button Mounting Mechanism 20 1st holding part 29 First elastic member 30, 30A biasing force addition section 31, 31A 2nd holding part 32 First shaft section 33. Pressing part 34. Rotating component (roller) 34a, 34b contact part 35 Second shaft section 39. Second elastic member 40 Mobile Unit f fabric

Claims

1. A button attachment mechanism (10, 10A) for attaching button members (1, 2, 3, 4, 5) to fabric (f), A pair of first holding parts (20) that hold the button members (1, 2, 3, 4, 5) between them, the first holding parts (20) being displaceable in a closing direction for holding the button members (1, 2, 3, 4, 5) and in an opening direction for releasing the holding of the button members (1, 2, 3, 4, 5), A first elastic member (29) biases the first holding portion (20) in the closing direction, In addition to the biasing of the first holding portion (20) in the closing direction by the first elastic member (29), there are biasing adding portions (30, 30A) that can bias the first holding portion (20) in the closing direction, The system includes a moving part (40) that moves the button members (1, 2, 3, 4, 5) to the attachment position on the fabric (f), The movable part (40) is a button mounting mechanism that releases or reduces the biasing of the first holding part (20) by the biasing adding part (30, 30A) during movement to the mounting position, and displaces the first holding part (20), from which the biasing by the biasing adding part (30, 30A) has been released or reduced, in the opening direction.

2. The button mounting mechanism according to claim 1, wherein the biasing portion (30, 30A) includes a pair of second holding portions (31, 31A) that are displaceable between a first position for holding the first holding portion (20) and a second position for releasing the first holding portion (20), and a second elastic member (39) that biases the second holding portions (31, 31A) to the first position.

3. The button mounting mechanism according to claim 2, wherein the second holding portion (31, 31A) has contact portions (34a, 34b) that are positioned within the movement path of the moving portion (40) at the first position and are capable of contacting the moving portion (40), the moving portion (40) contacts the contact portions (34a, 34b) and displaces the second holding portion (31, 31A) from the first position to the second position, and the contact portions (34a, 34b) are removed from the movement path at the second position.

4. The button mounting mechanism according to claim 2, wherein the second holding portion (31, 31A) has a first shaft portion (32), and the moving portion (40) contacts the second holding portion (31, 31A) and displaces the second holding portion (31, 31A) from a first position to a second position around the first shaft portion (32).

5. The button mounting mechanism according to claim 3, wherein the second holding portion (31) has a rotating member (34) that rotates due to friction with the moving portion (40), and the contact portion (34a) is a part of the rotating member (34).

6. The button mounting mechanism according to claim 5, wherein the second holding portion (31) has a second shaft portion (35), and the rotating member (34) rotates about the second shaft portion (35).

7. The button mounting mechanism according to claim 3, wherein the second holding portion (31, 31A) has a first shaft portion (32), the moving portion (40) contacts the second holding portion (31, 31A) and displaces the second holding portion (31, 31A) from a first position to a second position around the first shaft portion (32), and the contact portion (34a, 34b) is positioned downstream of the first shaft portion (32) in the movement path of the moving portion (40).

8. The button mounting mechanism according to claim 2, wherein the second holding portion (31, 31A) has a pressing portion (33) that presses the opening-side surface of the first holding portion (20) in the first position.

Images