JP2007037714A - Accessary device of game machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accessary device which makes an accessary operable quickly and smoothly. <P>SOLUTION: The accessary device 5 is provided with a stepping motor 20, swinging members 12 and 13 which act responding to a drive force from the stepping motor 20, a rotary cam 21 and a cam follower 18 which are provided between the stepping motor 20 and the swinging members 12 and 13 to transmit the drive force to the swinging members 12 and 13 from the stepping motor 20 and a link mechanism 15. A tension spring 14 is provided to reduce a clearance between the rotary cam 21 and the cam follower 18 and a clearance between an engaging protrusion 16 and a recess 17 making up the link mechanism 15 down to zero. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an accessory device in a gaming machine such as a pachinko gaming machine.

In a gaming machine represented by a pachinko gaming machine or the like, when a game ball wins in a start winning opening provided on the gaming board, the symbols displayed on the variable display device in the gaming board start to change, and after a predetermined time has passed. When the stopped symbol becomes a predetermined jackpot symbol, it becomes a big hit state, and the player can acquire a large number of balls. Some of these gaming machines perform various display effects in order to improve the interest of the game. For example, Patent Document 1 discloses a configuration in which an accessory moves in the left-right direction using a motor as a drive source in conjunction with the display content of a symbol display device when a big hit is made.
JP 2004-195084 A

  However, according to the gaming machine disclosed in the above-mentioned patent document, a mechanism part that converts rotational motion into linear motion is provided between the motor and the accessory, and there is a clearance between the members constituting this mechanism part. To do. For this reason, it is difficult to move the accessory quickly and smoothly due to this clearance. In particular, when the accessory is vibrated in small increments, there is a problem that the accessory cannot operate quickly and smoothly.

  An object of this invention is to provide the accessory apparatus which can solve the above problems and can enable an accessory to operate | move rapidly and smoothly.

  The accessory device of the present invention is provided between a drive source, a swing member that operates according to a drive force from the drive source, and the drive source and the swing member. An accessory device including a driving force transmission mechanism for transmitting force to the swinging member, wherein an elastic member is provided to always make the clearance between the members constituting the driving force transmission mechanism zero. Features.

  According to the present invention, the clearance between the constituent members of the driving force transmission mechanism is always kept zero by the biasing force of the elastic member, so that the driving force transmission mechanism does not delay the driving force from the driving source. Therefore, the oscillating member can follow the driving force from the driving source with good responsiveness and perform a quick and smooth operation.

  Further, the accessory device of the present invention is an accessory device having a plurality of swinging members that can be opened and closed by approaching and separating from each other when a predetermined game condition is satisfied, A driving force transmission mechanism for transmitting a driving force from a driving source to the specific swing member is provided, and the driving force from the specific swing member is transmitted to the other swing member between the swing members. A connection mechanism is provided, and an elastic member is provided to always make the clearance between the driving force transmission mechanism and the members constituting the connection mechanism zero.

  According to the present invention, the clearance between the components of the driving force transmission mechanism and the coupling mechanism is always kept at zero by the biasing force of the elastic member, so the driving force transmission mechanism delays the driving force from the driving source. And the coupling mechanism can transmit the driving force from the specific rocking member to the other rocking member without delaying, and therefore, a plurality of rocking members can be transmitted. Each member follows the driving force from the driving source with good responsiveness and performs a quick and smooth opening / closing operation.

  Here, the driving force transmission mechanism includes a rotating cam coupled to the driving shaft of the driving source, and a cam follower provided on the specific swing member and engaged with a cam surface of the rotating cam, The elastic member is configured by a spring that always presses and biases the cam follower against the cam surface. Thus, by constituting the elastic member with a spring, the structure can be simplified at low cost. Further, since the cam follower slides on the cam surface, the load on the drive source can be reduced.

  In addition, a support member that supports the swinging member below is provided, and when the support member is configured to support the swinging member in non-surface contact, the operating resistance of the swinging member is reduced, and the load of the driving source is reduced. Can be reduced.

  In addition, when a protrusion that contacts the counterpart member is formed on either the upper surface of the support member or the lower surface of the swing member, the load on the drive source can be reduced with a simple configuration.

  In addition, when the shape of the cam surface is set so that a predetermined gap is formed between adjacent swinging members when the swinging member is closed, the swinging members are connected to each other even if control is performed to close the swinging member at high speed. Can be avoided, and adverse effects on the drive source and the like due to the collision can be prevented. In addition, collisions can be avoided by the simple mechanical configuration as described above without performing complicated control on the drive source and the like.

  In addition, when a dry lubricant is applied to each member constituting the driving force transmission mechanism or the coupling mechanism, it becomes difficult to get dust and dirt, so that the driving force transmission mechanism or the coupling mechanism can be smoothly opened and closed. Is possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a game board of a pachinko gaming machine in which an accessory device according to an embodiment of the present invention is incorporated, FIG. 2 is a front view of the accessory device when not operating, and FIG. 3 is an accessory FIG. 4 is a front view during operation of the accessory device, FIG. 5 is a perspective view during operation of the accessory device, and FIG. 6 is an exploded perspective view of the accessory device. 7 is a rear view of the accessory device, FIG. 8 is a plan view for explaining the operation of the first movable accessory, and FIG. 9 is a perspective view of the drive system of the first movable accessory as viewed from the front side. 10 is a perspective view of the drive system of the first movable accessory as seen from the back side, FIG. 11 is a plan view of one swinging member side of the first movable accessory, and FIG. 12 is the second movable accessory. The top view for demonstrating operation | movement is shown, respectively.

  1 to 12, a decorative member 200 is disposed at the center of the game board 100.

  The decorative member 200 has a window portion 1 at the center, and is configured by surrounding the window portion 1 with a stage portion 2, a left wall portion 3, a right wall portion 4, and an accessory device 5. The window portion 1 has a rectangular shape and exposes a symbol display screen of a symbol display device that performs various image effects on the front surface.

  The left wall 3 and the right wall 4 of the decorative member 200 sandwiching the window 1 are used to guide the game balls rolling on the game board surface 101 to the inside of the decorative member 200, that is, on the stage unit 2, respectively. Stage guide passage 6 is provided. In the case of this embodiment, the stage unit 2 is a stage unit that is configured by three divided stage units in the depth direction (front-rear direction) and has a long depth. Of the game balls guided to the stage unit 2, the game ball that has entered a predetermined entrance of the stage unit 2 exits from the exit 2 a located immediately above the start winning port 102 to the game board surface 101 and starts the starting winning port 102. It is easy to win, and the remaining game balls fall from the stage portion 2 and in many cases do not win the start winning opening 102.

  The accessory device 5 includes a first movable accessory 7 and a second movable accessory 8.

  The first movable accessory 7 is composed of a character member written as “Mito Komon”, and the second movable accessory 8 is composed of a trefoil member of a three-leaf cocoon.

  The first movable accessory 7 is reciprocally movable in the left-right direction (width direction) of the game board 100, and includes a pair of left and right opening / closing members 7A, 7B that approach and separate from each other. The left opening / closing member 7A is composed of a character member “Mito”, and the right opening / closing member 7B is composed of a character member “Kimon”. As shown in FIGS. 2 and 3, when the first movable accessory 7 is not operated (when fully closed), the pair of opening and closing members 7A and 7B are brought into a close state, and when operated (when fully opened). As shown in FIGS. 4 and 5, the pair of opening and closing members 7A and 7B are in a separated state. In addition, the pair of opening and closing members 7A and 7B not only take two forms of a fully open state and a fully closed state, but also perform a vibration operation that alternately repeats the movement in the opening direction and the movement in the closing direction at high speed and in small increments. Sometimes it takes.

  The second movable accessory 8 can reciprocate in the front-rear direction (thickness direction) of the game board 100. As shown in FIGS. 2 and 3, the second movable accessory 8 is in a retracted state located behind the first movable accessory 7 in the fully closed state, as shown in FIGS. 2 and 3, and when activated, FIGS. As shown in FIG. 5, it will be in the advance state located ahead rather than the opening part of the 1st movable accessory 7 of a fully open state.

  The accessory device 5 includes a semi-oval base plate 11 as a support member, and is configured by mounting various members and components on the base plate 11.

  On the upper surface of the base plate 11, a pair of left and right plate-like rocking members 12 and 13 as shown in FIGS. 6 and 8 to 11 have an arcuate locus centering on the shaft portions 12a and 13a on the rear end side. It is mounted so as to be swingable in the left-right direction as shown. At the tip of the base plate 11, a protruding portion (projecting portion) 11c having at least an upper end formed thin is formed, and both swinging members 12, 13 are supported from below by the protruding portion 11c. . An opening / closing member 7A made of a character member “Mito” is attached to the front end portion 12b of the swinging member 12 on the left side when viewed from the front, and “Kantani” An opening / closing member 7B made of a character member is attached.

  The tip portions 12b and 13b of the swing members 12 and 13 are in a state of approaching with a predetermined gap x when fully closed (see FIGS. 2, 6, 8 (A) and 10). The gap x is for preventing the opening / closing members 7A and 7B from contacting each other even when fully closed, and is formed by setting the shape of the cam surface 21a.

  The right swing member 13 is restricted from moving in the opening direction (right direction) when the right end portion 13 c of the tip end portion 13 b abuts the right stopper surface 11 a of the tip end portion of the base plate 11. Further, the left oscillating member 12 is restricted from moving in the opening direction (left direction) by the left end portion 12c of the tip end portion 12b coming into contact with the left stopper surface 11b of the tip end portion of the base plate 11, thereby 1 The fully opened state of the movable accessory 7 is regulated.

  An elastic member 14 (see FIGS. 8 and 9) made of a tension spring is stretched between the center portion of the right end portion of the swing member 13 on the right side and the rear end portion of the base plate 11. The tension spring 14 always applies a force in the opening direction to the swing member 13 on the right side.

  The right swing member 13 and the left swing member 12 are connected by a connecting mechanism 15. The coupling mechanism 15 extends in the left-right direction on the engagement protrusion 16 formed on the left end side near the shaft portion 13a on the upper surface of the right swing member 13 and on the right side surface near the shaft portion 12a of the left swing member 12. And a concave portion 17 in which the engaging projection 16 is movably accommodated. The engaging protrusion 16 is always kept in the recessed portion 17 while the first movable accessory 7 is displaced between the fully closed state and the fully open state. As described above, the right swing member 13 is always urged in the opening direction by the tension spring 14. For this reason, the engagement protrusion 16 of the coupling mechanism 15 is always kept in contact with the inner wall surface of the recess 17, and the left swing member 12 is always urged in the opening direction.

  A lower case member 19 (FIG. 7) that opens downward is screwed to the upper surface of the base plate 11, and a stepping motor 20 as a drive source is fixed to the lower case member 19. The stepping motor 20 is placed vertically so that the output shaft 20a is positioned below. A rotating cam 21 is fixed to an output shaft (drive shaft) 20a of the stepping motor 20, and a cam follower protruding from the cam surface 21a (FIG. 8) of the rotating cam 21 on the upper surface of the left swing member 12. 18 is in contact. The cam surface 21a serves as a stopper that receives the cam follower 18 that tries to rotate around the shaft portion 12a by the biasing force in the opening direction applied to the left swing member 12 as described above, and prevents the movement thereof. Demonstrate the effect. In other words, the rotating cam 21 and the cam follower 18 exhibit an action as a restriction mechanism that prevents the swinging members 12 and 13 from moving in the opening direction. Further, the rotating cam 21 and the cam follower 18 exhibit an action as a driving force transmission mechanism that transmits the driving force of the stepping motor 20 to the left swing member 12.

  The cam surface 21a has a position P1 farthest from the rotation center 21b of the rotating cam 21 (see FIG. 8A) in order to restrict the swinging members 12, 13 (first movable accessory 7) to the fully closed state. In order to allow the swinging members 12 and 13 (first movable accessory 7) to be fully opened, a position P2 (see FIG. 8B) closest to the rotation center 21b of the rotary cam 21 is provided. A cam surface 21a is formed between P1 and P2 so that the distance gradually changes from the rotation center 21b of the rotary cam 21.

  On the upper surface of the lower case member 19, an upper case member 22 (FIGS. 6 and 7) whose bottom is opened is screwed. A pair of guide ribs 23 and 24 are formed at the front end of the upper surface of the upper case member 22 so as to be vertically spaced apart in the left-right direction. A guide member 25 is provided on the rear surface of the second movable accessory 10. The guide member 25 is formed with a pair of left and right guide hole portions 26 and 27 penetrating in the vertical direction extending in the front-rear direction. The guide ribs 23 and 24 are inserted into the guide hole portions 26 and 27, respectively, and the guide hole portions 26 and 27 move in the front-rear direction while being engaged with the guide ribs 23 and 24, so that the second movable combination. The object 8 can move smoothly in the front-rear direction.

  In the guide member 25, a long hole portion 28 penetrating in the vertical direction is formed extending in the left-right direction at a position located between the pair of guide hole portions 26, 27. Further, on the upper surface of the upper case member 22, a linear lever member 29 that can swing in the horizontal direction around a shaft portion 29 a fixed to the upper case member 22 is provided. A drive pin 30 extending downward is formed at the distal end of the lever member 29, and the drive pin 30 is inserted into the elongated hole 28.

  A stepping motor 31 is screwed to the lower surface of the upper case member 22. The stepping motor 31 is placed vertically with the output shaft 31a on top. A rotating plate 32 is fixed to the output shaft 31 a of the stepping motor 31, and a connecting pin 33 is formed eccentrically on the upper surface of the rotating plate 32. Further, a long hole portion 34 that penetrates in the vertical direction and extends in the longitudinal direction of the lever member 29 is formed at the base end portion of the lever member 29. The connecting pin 33 is inserted into the long hole portion 34.

  When the second movable accessory 8 is in the retracted position (see FIG. 12A), the connecting pin 33 is located at the front end, and the drive pin 30 of the lever member 29 is located at the rear end. Located at the end, the second movable accessory 8 is kept in the retracted position. When the stepping motor 31 rotates from this state, the connecting pin 33 presses the inner wall surface of the long hole portion 34 rearward, and the lever member 29 rotates about the shaft portion 29a in the counterclockwise direction in plan view. Presses the inner wall surface of the long hole portion 28 forward, whereby the second movable accessory 8 moves forward.

  After the second movable accessory 8 reaches the forward movement position (see FIG. 12B), when the stepping motor 31 further rotates in the same direction, the connecting pin 33 now presses the inner wall surface of the long hole portion 34 forward. Then, the lever member 29 rotates about the shaft portion 29a in the clockwise direction in plan view, so that the drive pin 30 presses the inner wall surface of the long hole portion 28 backward, whereby the second movable accessory 8 Recedes.

  Next, an operation example of the accessory device 5 configured as described above will be described.

  In the normal state, the first movable accessory 7 is in a fully closed state as shown in FIGS. 2, 3 and 8A, and the second movable accessory 8 is in FIGS. As shown in A), the first movable accessory 7 is in the backward retracted position. When the first movable accessory 7 is fully closed, the cam follower 18 of the left swing member 12 is always in contact with the cam surface 21a at a position P1 farthest from the rotation center 21b of the rotary cam 21, and a pair of swings The members 12 and 13 are restricted from moving in the opening direction. When fully closed, the engagement protrusion 16 of the coupling mechanism 15 is kept in contact with the inner wall surface of the recess 17 because the right swinging member 13 is constantly biased in the opening direction by the tension spring 14. It is.

  When a predetermined gaming state occurs, for example, when symbol variation starts, the first movable accessory 7 starts a vibration operation that repeatedly opens and closes at high speed and in small increments for several seconds. This vibration operation is performed by the cam follower 18 of the swing member 12 on the left side sliding on the cam surface 21a as the stepping motor 20 repeats normal rotation and reverse rotation. Incidentally, in the range indicated by the arrow S in FIG. 8A, the cam follower 18 oscillates by sliding on the cam surface 21a. In the range of S, since the curvature of the cam surface 21a is greatly changed, the vibration operation is possible with a slight rotation amount of the cam 21. Even during this vibration operation, the engagement protrusion 16 of the coupling mechanism 15 is always in contact with the inner wall surface of the recess 17 because the right swing member 13 is constantly biased in the opening direction by the tension spring 14. The coupling mechanism 15 is maintained in a coupled state without clearance. Therefore, when the rotation angle of the stepping motor 20 changes, both the oscillating members 12 and 13 can perform operations with excellent responsiveness and followability. At the start of the vibration, a sound effect “don” sounds, and after that, a sound effect “gogogo ...” sounds.

  Thereafter, when another predetermined gaming state occurs, for example, when the reach effect is confirmed, the first movable accessory 7 is fully opened. In the fully opening operation, the cam follower 18 moves along the cam surface 21a from the position P1 farthest from the rotation center 21b of the rotating cam 21 to the position P2 closest to the rotation of the stepping motor 20.

  Thereby, the opening / closing members 7A and 7B of the first movable accessory 7 are separated, and the front of the second movable accessory 8 is opened. Thereafter, the second movable accessory 8 that has been in the retracted position moves forward to the advanced position. This forward movement is performed by rotating the lever member 29 counterclockwise in plan view by the rotation of the stepping motor 31.

  As described above, the accessory device 5 according to the present embodiment includes the drive source (stepping motor 20), the swing members 12 and 13 that operate according to the drive force from the drive source 20, and the drive source 20. A driving force transmission mechanism (rotating cam 21, cam follower 18, coupling mechanism 15) provided between the rocking members 12 and 13 and transmitting the driving force from the drive source 20 to the rocking members 12 and 13 is provided. The accessory device is configured by providing an elastic member (a tension spring 14) for making the clearance between members constituting the driving force transmission mechanisms 21, 18, and 15 always zero.

  According to the present embodiment, the clearance between the constituent members of the driving force transmission mechanisms 21, 18, 15 is always kept at zero by the urging force of the elastic member 14, so that the driving force transmission mechanisms 21, 18, 15 are maintained. Can transmit the driving force from the driving source 20 to the oscillating members 12 and 13 without delaying. Therefore, the oscillating members 12 and 13 follow the driving force from the driving source 20 with good responsiveness. It will be quick and smooth.

  The accessory device 5 of the present embodiment is a accessory device having a plurality of swinging members 12 and 13 that can be opened and closed by approaching and separating from each other when a predetermined game condition is satisfied. A driving force transmission mechanism (rotating cam 21 and cam follower 18) for transmitting a driving force from the drive source 20 is provided to a specific swinging member (left swinging member 12) of the moving members 12 and 13, and each swinging member is provided. A connecting mechanism 15 for transmitting a driving force from a specific swinging member 12 to another swinging member (right swinging member 13) is provided between the members 12 and 13, and the driving force transmitting mechanisms 21 and 18 and An elastic member (a tension spring 14) is provided to make the clearance between members constituting the coupling mechanism 15 always zero.

  According to this embodiment, the clearance between the constituent members of the driving force transmission mechanisms 21 and 18 and the coupling mechanism 15 is always kept at zero by the urging force of the elastic member 14, so that the driving force transmission mechanisms 21 and 18 are maintained. Transmits the driving force from the driving source 20 to the specific rocking member 12 without delay, and the coupling mechanism 15 transmits the driving force from the specific rocking member 12 to the other rocking member 13 without delaying. Therefore, the plurality of swinging members 12 and 13 each follow the driving force from the driving source 20 with good responsiveness and perform a quick and smooth opening / closing operation.

  The driving force transmission mechanism includes a rotating cam 21 connected to the driving shaft 20 a of the driving source 20 and a cam follower 18 that is provided on a specific rocking member 12 and engages with the cam surface 21 a of the rotating cam 21. The elastic member is constituted by a spring 14 that always presses and biases the cam follower 18 against the cam surface 21a. By configuring the elastic member with the spring 14 in this way, the structure can be simplified at low cost. Further, since the cam follower 18 slides on the cam surface 21a, the load on the drive source 20 can be reduced.

  Moreover, the support member (base plate 11) which supports the rocking members 12 and 13 below is provided, and the support member 11 supports the rocking members 12 and 13 in non-surface contact. For this reason, the operating resistance of the oscillating members 12 and 13 is reduced, and the load on the drive source 20 can be reduced.

  Further, a protrusion (protruding portion 11 c) that contacts the rocking members 12 and 13 is formed on the upper surface of the support member 11. For this reason, the load of the drive source 20 can be reduced with a simple configuration. Note that the protrusion is not limited to a continuous protrusion shape like the protrusion portion 11c, and may be configured by an intermittent protrusion shape, and is not provided on the support member 11 side, and the oscillating members 12, 13 are provided. You may make it provide in the side.

  In addition, when the swing members 12 and 13 are closed (fully closed), a predetermined gap x is formed between the adjacent swing members 12 and 13. In other words, the shape of the cam surface 21a is set so that a predetermined gap x is formed between the swing members 12 and 13 when the swing members 12 and 13 are closed. For this reason, even if it performs control which closes rocking members 12 and 13 at high speed, it can avoid that rocking members 12 and 13 collide, and can prevent a bad influence to drive sources 20 etc. resulting from a collision. . Further, collisions can be avoided by the simple mechanical configuration as described above without performing complicated control on the drive source 20 and the like.

  In addition, the dry type lubricant (trade name Dry Surf of Harves Co., Ltd.) is apply | coated to each component and member which comprise the accessory apparatus 5 of this embodiment, especially a movable part. Specifically, the lubricant is applied to the engagement protrusions 16 and the recesses 17 constituting the coupling mechanism 15, the cam surface 21 a and the cam follower 18, and the contact surface between the swing member 12 and the swing member 13. ing. For this reason, it becomes difficult to attach dust and dust, and the smooth operation of each member can be continued. Dry surf is a quick-drying lubricant that instantly forms a thin and uniform fluorine coating film when applied to an object to be processed, and has effects such as wear reduction and noise reduction.

  Further, instead of the stepping motors 20 and 31, a DC motor, an electromagnetic solenoid or the like may be used. Further, instead of the tension spring 14, a compression spring may be provided on the opposite side of the swing member 13 as indicated by a two-dot chain line in FIG. Furthermore, as a modification of the basic configuration of the accessory device 5, the second movable accessory 8 is normally placed in front of the first movable accessory 7 during normal operation, and the first movable accessory 7 is opened during the production. You may make it employ | adopt the structure which retracts the 2nd movable combination 8 and closes the 1st movable combination 7 after that.

It is a front view of the game board of the pachinko gaming machine in which the accessory device according to one embodiment of the present invention is incorporated. It is a front view at the time of non-operation of an accessory device. It is a perspective view at the time of non-operation of an accessory device. It is a front view at the time of operation | movement of an accessory device. It is a perspective view at the time of operation | movement of an accessory device. It is a disassembled perspective view of an accessory apparatus. It is a rear view of an accessory device. It is a top view for demonstrating operation | movement of a 1st movable accessory. It is the perspective view which looked at the drive system of the 1st movable accessory from the front side. It is the perspective view which looked at the drive system of the 1st movable accessory from the back side. It is a top view by the side of one rocking | fluctuation member of a 1st movable accessory. It is a top view for demonstrating operation | movement of a 2nd movable accessory.

Explanation of symbols

5 Equipment 11 Base plate (support member)
11c ridge (projection)
12 Specific swing member 13 Other swing member 14 Tension spring (elastic member)
15 Connection mechanism (driving force transmission mechanism)
18 Cam follower (driving force transmission mechanism)
20 Stepping motor (drive source)
21 Rotating cam (driving force transmission mechanism)
21a Cam surface
x gap

Claims (7)

  A driving source, a swinging member that operates according to a driving force from the driving source, and a drive member that is provided between the driving source and the swinging member and that transmits the driving force from the driving source to the swinging member. An accessory device comprising a driving force transmission mechanism for providing an elastic member for always reducing a clearance between members constituting the driving force transmission mechanism to zero.   An accessory device having a plurality of swing members that can be opened and closed by approaching and separating from each other when a predetermined game condition is established, wherein a specific swing member among the swing members is connected to a drive source. A driving force transmission mechanism that transmits a driving force is provided, and a coupling mechanism that transmits a driving force from the specific rocking member to another rocking member is provided between the rocking members. An accessory device provided with an elastic member for making the clearance between members constituting the transmission mechanism and the coupling mechanism always zero.   The driving force transmission mechanism includes a rotating cam coupled to a driving shaft of the driving source, and a cam follower that is provided on the specific swinging member and engages with the rotating cam. The accessory device according to claim 1, wherein the accessory is configured by a spring that constantly presses and biases the cam follower against a cam surface.   The accessory according to any one of claims 1 to 3, further comprising a support member that supports the swinging member at a lower side, wherein the support member supports the swinging member in a non-surface contact. apparatus.   5. The accessory device according to claim 4, wherein a protrusion that contacts the counterpart member is formed on either the upper surface of the support member or the lower surface of the swing member.   4. The accessory device according to claim 3, wherein the shape of the cam surface is set so that a predetermined gap is formed between adjacent swing members when the swing member is closed.   The accessory device according to claim 1, wherein a dry lubricant is applied to each member constituting the driving force transmission mechanism or the coupling mechanism.

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