JPH05375Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is a thermal transfer method that enables a fine uneven pattern such as a phase hologram pattern to be uniformly and easily thermally transferred to a thermoplastic sheet. Regarding equipment.

(b) Prior Art FIG. 5 shows a general hologram information sheet onto which a hologram pattern has been transferred, in which 1 is a sheet made of a thermoplastic material, 2 is a hologram pattern formed on the sheet, and the pattern is is formed by thermal transfer.

6 to 10 show a concave-convex pattern thermal transfer device for forming a hologram pattern disclosed in Japanese Utility Model Publication No. 60-27669, in which 4 is provided with a press table 5 on which the sheet 1 is placed at the upper front side. The box-shaped base body 6 is a press arm whose base end is pivoted to the rear side of the base body 4 by a pivot shaft 7, and is given an upward rotational force by the biasing force of a spring 8. Reference numeral 9 denotes a clamp arm which is pivotally attached to the free end of the press arm 6 by a pivot 10, and a spring 11 applies rotational force in the counterclockwise direction in FIG. 8, that is, in the clamping direction. Locking part 9'
is formed, and this locking portion 9' is locked by a hook portion 42d of a movable body 42, which will be described later, by the force of the spring 11 in the clamping direction, and the press arm 6 is clamped, and the transfer standby state is established.

Reference numeral 12 denotes a rotating shaft rotatably attached to the center of the press arm 6 by means of a bearing 13;
4 is an elastic support whose base is fixed to the lower disc portion 12a of the rotating shaft 12 with a nut 15;
Elastic branch pieces 14' are formed radially at equal intervals from the base, and each elastic branch piece 14' is arranged in ten positioning recesses formed at equal intervals on the peripheral edge of the disc portion 12a of the rotating shaft 12. 12b, respectively, and are attached to the disc portion 12a. Numeral 16 indicates ten types of press heads attached to the tips of each elastic branch 14', and when the press arm 6 is clamped to the movable body 42 via the clamp arm 9, one of the ten press heads 16 is It is located above the press table 5. Reference numeral 17 denotes a selection knob fixed to the upper end of the rotating shaft 12, and includes a scale plate 17' that indicates the type of press head 16. The scale plate 17' is loosely inserted into the recess 6' at the upper part of the press arm 6, and is rotated. By doing so, any one of the press heads 16 is opposed to the press stand 5.

18 is a cylinder provided on the press arm 6 above the press head 16; 19 is a press pin that is slidably built into the cylinder 18 and whose lower end is led out from the cylinder 18; Time,
Press head 1 selected by selection knob 17
6 is pressed against the sheet 1 on the press table 5. 20 is a coil spring that urges the press pin 19 downward;
Reference numeral 1 indicates an inverted plate-shaped protective case fixed to the lower surface of the press arm 6 to protect the elastic support 14, and 22 is a terminal plate attached to the lower end of the rotating shaft 12, which is used to supply power to each press head 16. . 23 is a power supply lead wire connecting each press head 16 and the terminal board 22, and 24 is a protection stand, which is applied to the press heads 16 on both sides of the press head 16 selected by the selection knob 17 when the press arm 6 moves downward. This prevents both press heads 16 from coming into contact with the base body 4.

25 is a pair of support pieces fixed to both inner surfaces of the base 4; 26 is a pair of guide rails mounted in parallel between both support pieces 25 on both sides of the press table 5;
Reference numeral 27 designates a sheet holding stand slidably mounted on both guide rails 26, and reference numeral 28 represents an oblong transfer hole formed in the longitudinal direction at the center of the sheet holding stand 27, through which the press stand 5 is inserted. The top surface of the press stand 5 is almost flush with the top surface of the sheet holding stand 27, and when the sheet 1 is set on the sheet holding stand 27, the transferred portion of the sheet 1 is placed on the press stand 5. . Reference numeral 29 denotes a pair of elastic press plates attached to both rear sides of the upper surface of the sheet holding base 27, into which both sides of one end of the sheet 1 placed on the sheet holding base 27 are inserted to hold the sheet 1. do. 30
is a movable holding plate whose both ends are rotatably supported on both sides of the sheet holding stand 27, and holds the other end of the sheet 1. Reference numeral 31 denotes an articulation spring mounted between the sheet holding base 27 and the movable presser plate 30, and by rotating the movable presser plate 30 forward and backward, the movable presser plate 30 can be moved between the state in which the sheet 1 is pressed and the state in which the sheet is pressed. Hold it stably in the 2nd state of being pulled up to remove 1st.

32 is a cylinder fixed to the bottom plate of the base body 4 by two fittings 33; 34 is a piston of the cylinder 32; and 35 is a pair of cylinders erected in parallel to the bottom plate of the base body 1 on both sides of the extension line of the piston 34. These are guide plates, each having a loose insertion hole 35a in the center thereof, and a longitudinal guide groove 35b and a stepped portion 35c along the lower edge of the guide groove 35b on each opposing surface. each formed.
36, each guide groove 35 of both guide plates 35 is provided on both sides.
Both guide plates 35 are slidably inserted into b.
It is a sliding body mounted between the
6'. 37 is fixed to the upper surface of the sliding body 36, and one end is connected to the piston 34 by a nut 38.
The sliding member 36 is fixed to the piston 34, and the stepped portions 35c of both guide plates 35 serve as relief for the nut 38 when the piston 34 is operated. 39 is a micro switch whose contact piece is in contact with the connecting plate 37; 40 is a micro switch fixed to the bottom plate of the base plate 4 with a nut 41 at a position facing each loose insertion hole 35a of both guide plates 35; A pair of guide pins 42 are movable bodies, a pair of leg portions 42b are integrally connected via a connecting plate 42a, and both leg portions 42b are connected to each guide pin 40, respectively.
A movable body 42 is slidably inserted into the holder and is movable up and down, a locking arm portion 42c extends upward from the connecting portion 42a, and a hook portion 42d is provided at the end of the locking arm portion 42c. This hook portion 42d is opposed to the insertion hole 4'' of the upper plate of the base body 4, and when the clamp arm 9 is pushed down, the locking portion 9' of the clamp arm 9 inserted through the insertion hole 4'' is It locks onto the hook portion 42d as shown. Compression springs 43 are wound around both guide pins 40 and interposed between the bottom plate of the base body 4 and the lower surface of the legs 42b, and bias the movable body 42 upward.
Reference numeral 44 indicates an operating shaft that is loosely inserted into each of the loose insertion holes 35a of both guide plates 35 and has both ends fitted to both legs 42b of the movable body 42. Reference numeral 45 indicates a rotating ball bearing or the like mounted in the center of the operating shaft 44. body and compression spring 4
The movable body 3 is pressed against the tapered surface 36' of the sliding body 36 by the urging force applied to the movable body 3.

46 is an operation unit provided on the front side of the base 4;
7 is a power switch provided on the operation unit 46; 48;
is the clamp arm 9 and the movable body 42 by pressing operation.
A release switch 49 is a transfer switch.

Next, the first section showing details of the press head 16 is shown.
In FIG. 0, 50 is a bottomed cylindrical case made of a conductor that is attached to the elastic branch 14' of the elastic support 14 and also serves as one electrode, 51 is a transfer mold fixed to the lower surface of the cylindrical case 50, Fine uneven pattern 2 like a phase hologram pattern on the bottom surface
is formed. Reference numeral 52 denotes an electrically insulating cylindrical part housed in the lower part of the cylindrical case 50, and 53 denotes an insulating cylindrical part 5.
The heating element 2 is housed in the heating element 5. 54 is the other electrode plate mounted on the upper part of the heating element 53, and the cylindrical case 5
It is connected to the lead wire 23 introduced from the insertion hole 50' of 0. 55 is a plug that seals the upper opening of the cylindrical case 50 with an elastic spacer 56 interposed therebetween;
Reference numeral 57 denotes a pressing protrusion protruding from the center of the upper part of the stopper 55. Note that phase hologram patterns corresponding to ten different numbers from 0 to 9 are formed as the concave-convex patterns 2 of the transfer molds 51 of each of the ten press heads 16, and the other lead wire is attached to an elastic support. 14 also serves as.

Next, the operation of such a device will be explained.

Now, in the clamped state shown in FIG. 7, when the release switch 48 is pressed, the clamp arm 9
An operating lever (not shown) that engages rotates, and the clamp arm 9 rotates in the clockwise direction shown by the arrow in FIG. 42d is released, and the press arm 6 is rotated upward by the biasing force of the spring 8, resulting in the state shown in FIG.

Then, an upward force is applied to the sheet holder movable press plate 30 to make the movable press plate 30 stand up as shown in FIG. 6, and the transparent vinyl chloride resin sheet 1 is placed on the sheet holding table 27. , and a sheet holding stand 27 and an elastic presser plate 2 on both sides of one end of the sheet 1.
At the same time, the movable presser plate 30 is rotated to press and fix the other end of the sheet 1 with the movable presser plate 30, and the sheet 1 is set on the sheet holding table 27. Next, the sheet holding stand 27
is moved in one direction to determine the transfer position on the sheet 1. Then, the press arm 6 is rotated downward against the biasing force of the spring 8, and the clamp arm 9 is rotated downward.
The locking portion 9' is inserted through the insertion hole 4'' of the base body 4 and is locked to the hook portion 42d of the movable body 42. This state is shown in FIG. 7. At this time, as shown in the same figure, the press head 16 is in a state away from seat 1,
Furthermore, in each press head 16, the terminal plate 2
2 through the lead wire 23 and the elastic branch piece 14' of the elastic support 14 to the cylindrical case 50 and the electrode plate 54, the temperature of the heating element 53 rises, and the heat of this heating element 53 passes through the cylindrical case 50 and is transferred to the cylindrical case 50 and the electrode plate 54. The transfer molds 51 of each of the ten sets of press heads 16 are heated to the required temperature and are in a transfer standby state.

Next, operate the selection knob 17 to select the scale plate 1.
When 7' is aligned with the number desired to be transferred, the desired press head 16 corresponding thereto is opposed to the transfer position of the sheet 1. Although not shown, an L-shaped positioning lever is pivotally mounted on the press arm 6 near the elastic indicator 14, and a positioning roller rotatably attached to one end of the positioning lever is The positioning lever is pressed against the circumferential end of the disc plate 12a of the rotating shaft 12 by the biasing force of the pressing spring suspended on the other end of the positioning lever. Therefore, by operating the selection knob 17 described above, the rotation axis 1
2, when the elastic support 14 is rotated, the positioning roller moves through the ten positioning recesses 1 of the disc part 12a.
2b, the selection knob 17 is rotated, and each press head 16 is positioned so as to correctly face the press stand 5.

When the transfer switch 49 is pressed, the piston 34 moves forward from the state shown in FIG. 7 as shown in FIG.
The actuating shaft 44 is pushed down via the rotary body 45 that slides forward in the guide groove 35 and comes into sliding contact with the tapered surface 36' of the sliding body 36. 42 is pushed down against the biasing force of the compression spring 43, and the press arm 6 is also pushed down via the clamp arm 9 that engages with the movable body 42, and the press pin 1
9 comes into contact with the pressing protrusion 57 of the press head 16 and presses the press head 16 downward, and the heated transfer die 51 of the press head 16 is pressed against the transfer position of the sheet 1, and the uneven pattern of the transfer die 51 is pressed. 2 is thermally transferred onto sheet 1. During this thermal transfer operation, the rotation angle of the press arm 6 is
The operating range of the press pin 19 is always constant, and only a constant pressing force is applied to the press head 16.
Provide a sufficient distance from the pivot 7 of the press arm 6 to the press head 16, and ensure that each press head 16
by holding it at the end of each elastic branch 14',
On the sheet 1 placed on the horizontal press table 5,
The concavo-convex pattern 2 of the transfer mold 51 having a depth of several micrometers is uniformly thermally transferred.

Further, when the sliding body 36 slides, the micro switch 39 is turned on by the connecting plate 37, and when the micro switch 39 is turned on, a timer (not shown) starts driving, and after a certain period of time preset in the timer has elapsed. , the piston 34 moves rearward and returns to the transfer machine position shown in FIG. 7, completing one transfer operation.
Therefore, the time during which the press head 16 is in pressure contact with the sheet 1 is a constant time set in the timer.

Next, the sheet holding table 27 is moved in one direction by one digit of sheet 1, the selection knob 17 is operated to select the next press head 16, and the transfer switch 49 is pressed and operated, and the same operation as described above is performed. As a result, the concavo-convex pattern 2 is thermally transferred onto the sheet 1 as described above, and by repeating this operation a predetermined number of times, the concavo-convex pattern 2 is stamped in a sequential order on the sheet 1, and information as shown in FIG. 5 is printed. sheet 3
is produced.

(c) Problems to be solved by the invention However, in such a device, since the selection knob 17 is mounted directly on the coaxial upper part of the press arm 6,
There is a problem in that the heat generated from the heating element 53 is easily transmitted to the selection knob 17 via the press arm 6, and the selection knob 17 is therefore heated, making manual operation of the knob difficult.

(d) Means for solving the problem The present invention was made in view of the above points, and its structural feature is that the disc part and the shaft part are coaxially integrated, and the disc part and the shaft part are coaxially integrated, and rotatable wheel,
A press head main body mounted on the disk portion, a transfer mold mounted on the press head main body, a heating element that heats the press head main body, a rotating shaft disposed apart from the wheel, a selection knob for rotating the rotating shaft, The present invention includes a belt that transmits the rotational force of the rotating shaft to the shaft portion.

(e) Effect In such a configuration, the heating element and the selection knob are placed apart from each other, so the selection knob is not affected by heat.

(F) Embodiment FIGS. 1 to 3 show an embodiment of the present invention, in which 101 is a base, 102 is a support leg installed on the base, and 103 is fixed on the support leg. The attached mount 104 is a bearing section consisting of a bearing 105, etc., and the bearing section is embedded in the right side of the mount 103 in FIG. 106 is a wheel made of a material with good thermal conductivity such as horizontal copper or phosphor bronze; 107
is a cylindrical shaft portion of the wheel, and the lower end of the shaft portion passes through a bearing portion 104 and is rotatably supported by the bearing portion 104. 108
is a disk portion, and the disk portion is integrally formed coaxially with the shaft portion 107 above the shaft portion 107. Reference numeral 109 indicates a circumferential groove drilled in the peripheral wall of the disk portion 108, and reference numeral 110 indicates a plurality of mounting holes drilled in the outer circumference of the disk portion 108, each of which is centered on the axis of the disk portion 108. Located on a circle.
111 is a heating element, and the heating element is attached to the mounting base 103.
It is disposed on the peripheral wall of the shaft portion 107 located above, and supports the shaft portion 107 in a rotatable manner. Reference numeral 112 denotes a heat insulating material, which is disposed between the heat generating element 111 and the mounting base 103, and is arranged between the heat generating element 111 and the mounting base 103.
Prevent heat conduction to. 113 is a heating element housing, and the housing is arranged on the mounting base 103 so as to surround the heating element 111. Reference numeral 114 denotes a temperature detection sensor, which is disposed on the right end side in FIG. 2 so that its tip abuts inside the circumferential groove 109. 115 is a thermal control circuit, which controls the heating element 111 based on the detection signal from the sensor 114, thereby controlling the temperature of the wheel 106.
maintain the temperature at a specified value. 116 is a press head body made of a material with good thermal conductivity such as brass or phosphor bronze, and has a brim-like upper part; 117 is a regulating groove formed on the side wall of the main body and extends in the vertical direction; 118 is a spring;
Reference numeral 119 denotes a pin attached to reach the mounting hole 110 from the peripheral wall of the disk portion 108, and the press head main body 116 is inserted into the device hole 110, and the pin 119 is attached to the bottom of the regulation groove 117.
The spring 118 is mounted between the collar portion and the surface of the disk portion 108.
Therefore, when the press head main body 116 is pressed from above, it slides downward against the spring force of the spring 118, but when the pressing force is released, it slides upward due to the spring force. . Furthermore, since the tip of the pin 119 is in contact with the bottom of the regulation groove 117, the sliding length is the same as the extension length of the regulation groove 117. Further, the pin 119 prevents the press head body 116 from rotating within the mounting hole 110. 120 is the press head body 116
This is a depression formed in the center of the upper surface, and the upper surface around the depression is inclined outward. Reference numeral 121 denotes a transfer mold attached to the bottom surface of the press head main body 116, and a phase pattern corresponding to, for example, a number is formed on each surface of the transfer mold. 122 is a pair of pillars installed on the base 101, and 123 is a pair of pillars 1 installed across the mounting plate 103.
A second mounting plate 124 suspended between 22 and 124 is an air cylinder whose lower end 125 is vertically slidable, and which is connected to the press head body 116 whose lower end 125 is located at the leftmost end in FIG. It is fixed to the second mounting plate 123 so as to face the top surface. A first member 126 is fixed to the lower end 125 of the cylinder 124 with a nut 127, and this member has an inverted U-shaped cross section. 128 is a second member, which has a cross section U
The upper end thereof is inserted into the first member 126 and fixed to the first member 126 with a nut 129 . 130 is a hemispherical opening formed in the bottom surface of the second member 128, and the upper opening area of the opening is smaller than the lower opening area 1
Reference numeral 31 denotes a steel ball, which is fitted into the aperture 130 and whose upper and lower ends are connected to the aperture 1.
It stands out from 30. 132 is the second member 128
A fixing member fixed inside the upper end, 133 an insertion hole bored at a position facing the opening 130 of the member, 134 a press pin, and 135 an inverted conical hole formed at the center of the bottom surface of the press pin. , 136 is an upright part planted on the upper surface of the press pin 134,
The inverted conical hole 135 on the bottom surface of the press pin 134 fits into the upper end of the steel ball 131, and the upright portion 136
is arranged so as to be inserted through the insertion hole 133. 137 is a spring, and this spring is attached to the press pin 1
34 and the fixing member 132. Therefore, when a push-up force is applied from the bottom surface of the steel ball 131, the press pin 134 rises against the spring 137, and when the push-up force is released, the spring 1
The press pin 134 is returned to the bottom surface within the second member 128 by the spring force 37 . In addition, the steel ball 13
1 fits into the recess 120 when the press head main body 116 is located directly below the steel ball 131.

Reference numeral 138 denotes a pair of mounting plates facing each other near the left end of the disk portion 108, and the mounting plates are fixed to opposing sides of the mounting base 103 (sides extending parallel to the paper in FIG. 2). Reference numeral 139 denotes a pair of guide rods, which are stretched between the mounting plates 138 below the disk portion 108 so as to extend parallel to each other. Reference numeral 140 denotes a sheet holding base, which is mounted on the guide rods 139 below the disk portion 108 and is slidable in a direction perpendicular to the paper in FIG. 2. Reference numeral 141 denotes a restricting hole, which is bored in the portion of the holding base 140 directly below the air cylinder 124 so as to extend in a direction perpendicular to the paper in FIG. 2. Reference numeral 142 denotes a positioning opening, which is provided for positioning the air cylinder 124.
2. The mounting base 103 is provided with a hole 143 which is inserted into the positioning opening 142, and the base 144 is a base which is loosely inserted into the restriction opening 141 at its upper portion and is fixed integrally to the fixing member 143 at its bottom surface. The width of the base in the horizontal direction of the drawing in FIG. 2 is larger than that of the positioning opening 142.
Reference numeral 145 denotes a U-shaped hole formed on the top surface of the base 144, 146 denotes an inverted cone hole formed at the bottom of the U-shaped hole, 147 denotes a steel ball disposed on the hole, 148 denotes a press table, and 14
9 is a conical hole formed on the bottom surface of the press table,
The press table 148 is loosely inserted into the U-shaped hole 145 of the base 144 so that the conical hole 149 is located above the steel ball 147, and the surface of the press table 148 swings around the steel ball 147 side, and the upper surface of the press table 148 protrudes from the surface of the sheet holding table 140. Reference numeral 150 denotes a feed knob (not shown in FIG. 2), and 151 denotes a sliding mechanism. When the feed knob 150 is operated, the sliding mechanism 151 moves the sheet holding table 140.
0 is slid in the direction perpendicular to the paper surface of FIG.

152 is a first pulley, and this pulley is fixed to the shaft portion 107 that protrudes below the mounting base 103. Reference numeral 153 denotes a rotating shaft, which is inserted through the mounting base 103 on the left side of the mounting base 103 in FIG. 2 and is rotatably mounted thereon. 154 is a selection knob, and this knob is fixed to the upper end of the rotating shaft 153 protruding from the surface of the mounting base 103.
155 is a second pulley, which is attached to the mounting base 1.
03 is fixed near the lower end of a rotating shaft 153 that protrudes downward. 156 is an endless belt made of rubber,
The belt is attached to the first and second pulleys 152, 155.
suspended between. Therefore, the above selection knob 1
54, the rotational force is applied to the rotating shaft 153, the second pulley 155, and the endless belt 15.
6. It is applied to the wheel 106 via the first pulley 152, and the wheel 106 can be rotated around the shaft portion 107.

Reference numeral 157 is an operating switch attached to the upper surface of the mounting base 103, and when the switch is pressed, the air cylinder 124 is operated and its lower end 125 is lowered. Further, at this time, since the descending force is transmitted to the press head main body 116 via the first member 126, the second member 128, and the steel ball 131, the press head main body 116 also descends toward the press table 148. Become.

158 is a first cover that covers the wheel 106;
59 is a second cover, which covers the left surface of the mounting base 103 as shown in FIG.

Next, using such a device, the hologram sheet 16
The operation for transferring a hologram pattern onto 0 will be explained.

First, as shown in FIG. 2, place the hologram sheet 160 on the sheet holding stand 140, operate the feed knob 150 to slide the sheet holding part 140, and place the sheet 160 at a predetermined position with respect to the press stand 148. At the same time, the heat control circuit 115 sets the wheel 106 to a predetermined temperature.

Next, the selection knob 154 is operated to rotate the wheel 106, and the press head main body 116, on which the transfer mold 121 having the desired uneven pattern is mounted, is coaxially positioned directly below the air cylinder 124. The positioning of the press head main body 116 and the air cylinder 124 is performed by a steel ball 131 arranged on the bottom surface of the second member 128 fixed to the air cylinder 124 and a recess 120 formed on the top surface of the press head main body 116. . Therefore, even if a slight positional deviation occurs such that the steel ball 131 is located on the edge of the recess 120 during positioning by operating the selection knob 154, the force of the springs 118 and 137 will cause the steel ball 13 to
1 about to fall into the recess 120, the air cylinder 124 and the press head body 116 will automatically become coaxially aligned.

Then, press the operating switch 157 to operate the air cylinder 124 and press the press head main body 116.
By lowering the hologram, the transfer mold 121 attached to the bottom surface is brought into pressure contact with the sheet 160, and a desired hologram pattern is transferred onto the sheet 160. At this time, a press stand 148 is located at a position facing the press head 116 via the seat 160, and the press stand 148 is placed on the steel ball 147 located on the bottom surface of the pedestal 144. 144 so that it can slide freely,
For example, even when the surface of the transfer mold 121 is not horizontal as shown in FIG. 4, the plane of the press table 148 is always parallel to the surface of the transfer mold 121. Therefore, one-sided pressing of the thermally transferred hologram pattern does not occur.

Further, each of the press head bodies 116 is located at an equal distance from the central axis of the wheel 106, and a heating element 11 inserted into the shaft portion 107 of the wheel 106 is provided.
1, each press head body 116 is always heated uniformly. Furthermore, since the selection knob 154 for rotating the wheel 106 is thermally insulated by the wheel 106 and the endless belt 156, the selection knob 154 rotates the wheel 106.
is never heated.

(G) Effects of the invention According to the invention, since the selection knob and the heating element are insulated from heat, the selection knob does not get heated, and the manual operation of the knob can be performed without any trouble.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, Figure 1 is a perspective view, Figure 2 is a sectional view taken along line A-A' in Figure 1, and Figures 3 and 4 are enlarged views of main parts. A cross-sectional view,
5 to 10 show conventional examples, FIG. 5 is a plan view of an information sheet, FIG. 6 is a perspective view of a thermal transfer device, and FIGS. 7 and 8 are views of the device shown in FIG. 6. 9 is an exploded perspective view of the main part of the apparatus shown in FIG. 6, and FIG. 10 is an enlarged sectional view of the main part of the apparatus shown in FIG. 6. 106...Wheel, 107...Shaft part, 108
...disc part, 111 ... heating element, 116 ... press head main body, 121 ... transfer mold, 153 ... rotary shaft, 154 ... selection knob, 156 ... belt.

Claims (1)

[Scope of utility model registration request] A wheel in which a disc part and a shaft part are coaxially integrated and rotatable around the shaft, a press head body attached to the disc part, a transfer mold attached to the press head body, and a press head body heated. An uneven pattern transfer characterized by comprising: a heating element that rotates, a rotating shaft that is spaced apart from the wheel, a selection knob that rotates the rotating shaft, and a belt that transmits the rotational force of the rotating shaft to the shaft portion. Device.