Variable Hand Switch

Abstract

This variable hand switch (100) comprises: a body portion (120); an operating portion (110) disposed so as to gradually move away from the body portion (120) from one end and having a support portion that is supported at one end by the body portion (120); an elastic member (140) disposed between the body portion (120) and the operating portion (110) in order to urge the operating portion (110) in a direction away from the body portion (120); and a plurality of sensor members (161, 162, 163, 164) disposed side by side along one direction of the body portion (120). The plurality of sensor members (161, 162, 163, 164) are sequentially controlled, in accordance with the movement amount of the operating portion (110), by moving the operating portion (110) in a direction approaching the body portion (120), against the elastic force of the elastic member (140), or to a side moving away from the body portion (120), yielding to the elastic force of the elastic member (140), so as to output a bit signal to a body device (20).

Description

Technical Field

[0001] This invention relates to a variable hand switch.

Background Art

[0002] Variable hand switches are widely used as a means to operate power equipment and measuring equipment at a location away from the equipment body, and are frequently used in the medical field, especially in the surgical operation site.

[0003] Such variable hand switches are disclosed in Re-Published Patent No. 2004 / 086438 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2020-038415 (Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a variable hand switch, it is required to reduce the number of parts. This enables cost reduction and disposable use required for the variable hand switch.

[0006] The object of the present technology is to provide a variable hand switch that enables reduction of the number of parts.

Means for Solving the Problems

[0007] [1] The variable hand switch according to this technology is a variable hand switch for outputting a bit signal using infrared light to a main unit, comprising: a main unit; an operating unit having a support unit which is arranged so as to gradually move away from the main unit from one end and whose one end is supported by the main unit; an elastic member which is arranged between the main unit and the operating unit in order to bias the operating unit away from the main unit; and a plurality of sensor members which are arranged in line along the direction of the main unit, and by moving the operating unit in the direction towards the main unit against the elastic force of the elastic member, or moving it away from the main unit by allowing the elastic force of the elastic member to move, the plurality of sensor members are sequentially controlled according to the amount of movement of the operating unit, and a bit signal is output to the main unit.

[0008] [2]:In the variable hand switch described in [1], the sensor member is a photo sensor whose light reception and light shielding are controlled by the movement of the operating part.

[0009] [3]:In the variable hand switch described in [1], the sensor member is a push-button switch in which the ON and OFF states of the operating part are controlled by contact with the operating part.

[0010] [4]: A variable hand switch according to any of [1] to [3], including a power switch that turns on the power of multiple sensor members. [Effects of the Invention]

[0011] This technology makes it possible to provide a variable hand switch that reduces the number of components. [Brief explanation of the drawing]

[0012] [Figure 1] This figure shows an example of the application of the variable hand switch of Embodiment 1. [Figure 2] This is a perspective view showing the internal structure of the variable hand switch according to Embodiment 1. [Figure 3] It is an exploded perspective view showing the internal structure of the variable hand switch of Embodiment 1. [Figure 4] It is a perspective view showing the operating state of the variable hand switch of Embodiment 1. [Figure 5] It is a graph showing the bit signal of the variable hand switch of Embodiment 1. [Figure 6] It is a circuit diagram of the light emitting and receiving part of the variable hand switch of Embodiment 1. [Figure 7] It is a perspective view showing the internal structure of the variable hand switch of Embodiment 2. [Figure 8] It is a graph showing the bit signal of the variable hand switch of Embodiment 2. [Figure 9] It is a first perspective view showing the operating state of the variable hand switch of Embodiment 2. [Figure 10] It is a second perspective view showing the operating state of the variable hand switch of Embodiment 2. [Figure 11] It is a perspective view showing the internal structure of the variable hand switch of Embodiment 3. [Figure 12] It is a plan view of the variable hand switch of Embodiment 3. [Figure 13] It is a perspective view showing the operating state of the variable hand switch of Embodiment 3. [Figure 14] It is a plan view showing the operating state of the variable hand switch of Embodiment 3. [Figure 15] It is a perspective view showing the internal structure of the variable hand switch of Embodiment 4. [Figure 16] It is an exploded perspective view showing the internal structure of the variable hand switch of Embodiment 4. [Figure 17] It is a perspective view showing the operating state of the variable hand switch of Embodiment 4.

Embodiments for Carrying Out the Invention

[0013] The following describes each embodiment of the present technology. The same or corresponding parts may be denoted by the same reference numerals, and the description thereof may not be repeated.

[0014] In each of the embodiments described below, when referring to the number, amount, etc., unless otherwise specified, the scope of the present technology is not necessarily limited to the number, amount, etc. Also, in the following embodiments, each component is not necessarily essential for the present technology, unless otherwise specified.

[0015] In this specification, the descriptions of "comprise", "include", and "have" are in an open-ended format. That is, when including a certain configuration, other configurations outside the said configuration may or may not be included. Also, the present technology is not necessarily limited to those that necessarily exhibit all the effects described in this embodiment.

[0016] (Embodiment 1: Variable Hand Switch 100) Referring to FIGS. 1 to 6, the variable hand switch 100 in this embodiment will be described. FIG. 1 is a diagram showing an application example of the variable hand switch 100, FIG. 2 is a perspective view showing the internal structure of the variable hand switch 100, FIG. 3 is an exploded perspective view showing the internal structure of the variable hand switch 100, FIG. 4 is a perspective view showing the operating state of the variable hand switch 100, FIG. 5 is a graph showing the bit signal of the variable hand switch 100, and FIG. 6 is a circuit diagram of the light emitting / receiving part of the variable hand switch 100.

[0017] The variable hand switch 100 is used, for example, in angiography, as shown in Figure 1, and is applied to control the amount of contrast agent, etc., introduced into the patient from the syringe 30 of the injector head 20. Infrared light is used for communication between the variable hand switch 100 and the injector head 20. If radio waves were used for communication with the injector head 20, it would be possible to communicate with different injector heads 20 across rooms, which could lead to erroneous operation. Therefore, it is preferable to use infrared light, which does not allow communication across rooms, for communication between the variable hand switch 100 and the injector head 20.

[0018] Referring to Figure 2, the external configuration of the variable hand switch 100 will be described. The variable hand switch 100 has a main body case 100b and a top cover case 100a. The top cover case 100a is provided with a control switch cover 11 and a raw switch cover 13. The various mechanisms of the variable hand switch are housed inside the main body case 100b.

[0019] Referring to Figure 3, the variable hand switch 100 has a main body substrate 120 as the main body portion extending along one direction (direction X in the figure). An operating plate 110 as the operating portion is positioned on the upper side of the main body substrate 120.

[0020] The operating plate 110 is positioned at an angle so as to gradually move away from the main substrate 120 from one end, and has a support portion A1 at one end that is supported by the main substrate 120. A pair of semi-circular locking pieces 110a are provided on the side of one end of the operating plate 110.

[0021] A pair of inwardly oriented notches 120a are provided on one end of the main circuit board 120. When the locking piece 110a of the operating plate 110 engages with the notches 120a of the main circuit board 120, a support portion A1 is formed, and the operating plate 110 becomes rotatable relative to the main circuit board 120 with this support portion A1 as the pivot point.

[0022] On the main circuit board 120, the raw material switch 130, elastic spring support pin 120b, sensor power switch 150, and bit plate through hole 120s are arranged in this order from the notch 120a toward the front side as shown in the figure. A mechanical switch is used for the sensor power switch 150. The operation button 130b of the raw material switch 130 is positioned to face upwards. The operation button 150b of the sensor power switch 150 is positioned laterally to face the bit plate through hole 120s.

[0023] An elastic spring support pin 110b and a bit plate 180 are provided on the main circuit board 120 side of the operating plate 110. The bit plate 180 is a fan-shaped plate member and has a plurality of through holes 180h for forming the bit signal shown in Figure 5. On the side of the bit plate 180 facing the sensor power switch 150, there is a contact portion 180a that the operation button 150b of the sensor power switch 150 makes contact with.

[0024] An elastic spring 140 is held between the elastic spring support pin 110b of the operating plate 110 and the elastic spring support pin 120b of the main board 120, acting as an elastic member. The elastic force of this elastic spring 140 biases the operating plate 110 away from the main board 120, and also provides an elastic force that returns the operating plate 110 to its original position when it is pushed towards the main board 120.

[0025] The bit plate through-hole 120s is provided in an elongated elliptical shape along the longitudinal direction of the main substrate 120, through which the bit plate 180, described later, passes (see Figure 4). On both sides of the bit plate through-hole 120s in a direction intersecting the longitudinal direction, the first sensor 161, the second sensor 162, the third sensor 163, and the fourth sensor 164 are arranged along the longitudinal direction. The first sensor 161, the second sensor 162, the third sensor 163, and the fourth sensor 164 each use photosensors.

[0026] The first sensor 161 includes a light-emitting element 161a and a light-receiving element 161b. The second sensor 162 includes a light-emitting element 162a and a light-receiving element 162b. The third sensor 163 includes a light-emitting element 163a and a light-receiving element 163b. The fourth sensor 164 includes a light-emitting element 164a and a light-receiving element 164b.

[0027] The first sensor 161, the second sensor 162, the third sensor 163, and the fourth sensor 164 constitute the sensor member.

[0028] Referring to Figures 3 and 5, the L column of the bit plate 180 has eight through holes 180h, corresponding to the bit signal strengths "0" to "7". The A, B, and C columns also have through holes 180h at positions corresponding to "1" in Figure 5. Since the operating plate 110 rotates around the support A1, the through holes 180h in the L, A, B, and C columns are positioned on an arc centered on the support A1. The L column is a decimal number, and the rows of the A, B, and C columns constitute a binary number (3 bits).

[0029] (Control of the amount of contrast agent introduced) The control of the amount of contrast agent introduced by operating the operating plate 110 will now be explained. By gradually pushing the operating plate 110 toward the main board 120 (the state shown in Figure 4 is the fully pushed-in state), the contact portion 180a of the bit plate 180 first comes into contact with the operation button 150b of the sensor power switch 150. As a result, the contact portion 180a of the bit plate 180 turns the sensor power switch 150 ON. Consequently, as shown in Figure 6, each first sensor 161 turns ON. The same applies to the other sensors.

[0030] In this way, by controlling the first sensor 161, second sensor 162, third sensor 163, and fourth sensor 164 from the OFF state to the ON state when operating the operating plate 110, it is possible to save power consumption when the first sensor 161, second sensor 162, third sensor 163, and fourth sensor 164 are in the OFF state.

[0031] In particular, since the variable hand switch 100 is remotely operated using infrared light powered by a built-in battery 50, saving power consumption is important. Therefore, when the operating plate 110 is at its furthest position from the main circuit board 120, the contact portion 180a of the bit plate 180 is separated from the operation button 150b, and the sensor power switch 150 is in the OFF state.

[0032] Next, when the operating plate 110 is pushed in to the first position, for example, at the L0 column position, only the first sensor 161 is detected, while the second sensor 162, third sensor 163, and fourth sensor 164 are not detected. As a result, the amount of contrast agent introduced is controlled to "0".

[0033] Subsequently, when the operating plate 110 is pushed in to the second stage, the first sensor 161 and the second sensor 162 are detected at the L1 column position, and the amount of contrast agent introduced is controlled to "1".

[0034] Furthermore, when the operating plate 110 is pushed in to the third stage, the first sensor 161 and the third sensor 163 are detected in column L2, and the amount of contrast agent introduced is controlled to "2". The rows of columns A, B, and C constitute a binary number (3 bits). In this way, this embodiment makes it possible to control the amount of contrast agent introduced in eight stages from L0 to L7 according to the amount the operating plate 110 is pushed in.

[0035] As described above, with the variable hand switch 100 of this embodiment, the operating plate 110 is moved toward the main circuit board 120 against the elastic force of the elastic spring 140, or moved toward the side away from the main circuit board 120 by allowing the elastic force of the elastic spring 140 to move. In accordance with the amount of movement of the operating plate 110, multiple sensor members are sequentially controlled, and a bit signal is output to the injector head 20, which is the main device. As a result, the number of parts can be reduced, enabling cost reduction and disposability required for the variable hand switch 100.

[0036] (Embodiment 2: Variable Hand Switch 200) The configuration of the variable hand switch 200 of this embodiment will be described with reference to Figures 7 to 10. Figure 7 is a perspective view showing the internal structure of the variable hand switch 200, Figure 8 is a graph showing the bit signals of the variable hand switch 200, and Figures 9 and 10 are first and second perspective views showing the operating state of the variable hand switch 200. Since the configuration of the main body case and top cover case of the variable hand switch 200 is the same as in Embodiment 1 described above, only the internal mechanism will be described below.

[0037] The variable hand switch 200 has a main body substrate 250 which extends along one direction (direction X in the figure). An operating plate 270 which serves as an operating part is positioned on the upper side of the main body substrate 250.

[0038] The operating plate 270 is curved so as to gradually move away from the main substrate 250 from one end, and one end is fixed to the main substrate 250 via a support member 251. The operating plate 270 is made of an elastic material and itself serves as an elastic member positioned between the main substrate 250 and the operating plate 270. The tip of the operating plate 270 is provided with an imaging button 260 for operating the operating plate 270.

[0039] On the main circuit board 250, the first sensor 210, the second sensor 220, the third sensor 230, and the fourth sensor 240 are arranged in this order, starting from the support member 251 and moving towards the front in the diagram. A mechanical switch is used for each sensor.

[0040] (Control of the amount of contrast agent introduced) The control of the amount of contrast agent introduced is typically performed using a graph showing the bit signals as shown in Figure 8, but this embodiment is simplified. Specifically, as shown in Figure 9, by gradually pushing the operating plate 270 in the direction of arrow F in the figure, the first sensor 210 is turned ON, and the amount of contrast agent introduced is controlled to the position of column L1. Next, when the first sensor 210 and the second sensor 220 are turned ON, the amount of contrast agent introduced is controlled to the position of column L3. Next, when the first sensor 210, the second sensor 220, and the third sensor 230 are turned ON, the amount of contrast agent introduced is controlled to the position of column L7. Next, when the first sensor 210, the second sensor 220, the third sensor 230, and the fourth sensor 240 are turned ON, the amount of contrast agent introduced is controlled to the position of column L15.

[0041] Even with this configuration, by moving the operating plate 270 toward the main substrate 250 against the elastic force of the operating plate 270 itself, or moving toward the main substrate 250 by allowing the elastic force of the operating plate 270 itself to move toward the main substrate 250, multiple sensor members are sequentially controlled according to the amount of movement of the operating plate 270, and a bit signal is output to the injector head 20, which is the main device. As a result, similar to the variable hand switch 100 of Embodiment 1, it is possible to reduce the number of parts, enabling cost reduction and disposability required for the variable hand switch 200.

[0042] (Embodiment 3: Variable Hand Switch 300) The configuration of the variable hand switch 300 of this embodiment will be described with reference to Figures 11 to 14. Figure 11 is a perspective view showing the internal structure of the variable hand switch 300, Figure 12 is a plan view of the variable hand switch 300, Figure 13 is a perspective view showing the operating state of the variable hand switch 300, and Figure 14 is a plan view showing the operating state of the variable hand switch 300. In this variable hand switch 200, only the internal mechanism will be described below.

[0043] The variable hand switch 300 has a main body circuit board 380 as its main body. In this embodiment, the main body circuit board 380 is square in plan view, but the reference direction (direction X in the figure) is the tangential direction from the pivot axis 350a of the spiral-shaped operating plate 350, which will be described later, to the direction in which the spiral of the operating plate 350 begins.

[0044] An operating plate 350, which serves as the operating part, is positioned on the upper side of the main circuit board 250 and is provided to extend upward in a spiral shape. The pivot shaft 350a of the operating plate 350 is fixed to a fixed block 390 provided on the operating plate 350. Specifically, a cylindrical bearing hole 390a is provided in the fixed block 390, and the pivot shaft 350a is rotatably supported in this bearing hole 390a. The pivot shaft 350a of the operating plate 350 is rotatable vertically around the bearing hole 390a.

[0045] The actuation plate 350, acting as an elastic member, is made of a resin spring. The actuation plate 350 has an annular spiral shape. An upper and lower sliding rod 360 is positioned in the center, and the upper and lower sliding rod 360 is provided to slide vertically through a through hole (not shown) provided in the main body substrate 380. A contrast-enhancing button 370 is attached to the upper end of the upper and lower sliding rod 360. The actuation plate 350 is provided within a 360-degree range in a plan view, and the other end is fixed to the upper and lower sliding rod 360 via a fixing ring 340s.

[0046] On the upper surface of the main circuit board 250, the first sensor 310, the second sensor 320, the third sensor 330, and the fourth sensor 340 are arranged in a circular, counterclockwise direction along the spiral shape of the operating plate 350, in that order. A mechanical switch is used for each sensor.

[0047] (Control of the amount of contrast agent introduced) To control the amount of contrast agent introduced, a graph showing the bit signals shown in Figure 8 is used, similar to the variable hand switch 200 in Embodiment 2. Specifically, as shown in Figure 8, when the operating plate 350 is gradually pushed in the direction of arrow F in the figure, the amount of contrast agent introduced is controlled to the position of column L1 when the first sensor 310 is turned ON. Next, when the first sensor 310 and the second sensor 320 are turned ON, the amount of contrast agent introduced is controlled to the position of column L3. Next, when the first sensor 310, the second sensor 320, and the third sensor 330 are turned ON, the amount of contrast agent introduced is controlled to the position of column L7. Next, when the first sensor 310, the second sensor 320, the third sensor 330, and the fourth sensor 340 are turned ON, the amount of contrast agent introduced is controlled to the position of column L15.

[0048] Even with this configuration, by moving the operating plate 350 toward the main board 380 against the elastic force of the operating plate 350 itself, or moving toward the main board 380 away from the main board 380 by allowing the elastic force of the operating plate 350 itself to move, multiple sensor members are sequentially controlled according to the amount of movement of the operating plate 350, and a bit signal is output to the injector head 20, which is the main device. As a result, similar to the variable hand switch 100 of Embodiment 1, it is possible to reduce the number of parts, enabling cost reduction and disposability required for the variable hand switch 300.

[0049] (Embodiment 4: Variable Hand Switch 400) The configuration of the variable hand switch 400 of this embodiment will be described with reference to Figures 15 to 17. Figure 15 is a perspective view showing the internal structure of the variable hand switch 400, Figure 16 is an exploded perspective view showing the internal structure of the variable hand switch 400, and Figure 17 is a perspective view showing the operating state of the variable hand switch 400.

[0050] Referring to Figures 15 and 16, the variable hand switch 400 has a main body circuit board 450 as its main body. In this embodiment, the main body circuit board 450 is square in plan view, but one reference direction (direction X in the figure) is the direction in which the rod-shaped operating part 460, which will be described later, extends.

[0051] The operating part 460 has a shape that extends in the vertical direction and passes through a through hole 450s provided in the main body substrate 450. On the back side of the main body substrate 450, there is a coil spring 480 as an elastic member for biasing the operating part 460 upward, a support member 470 that supports the coil spring 480 and is fixed to the lower surface of the main body substrate 450, and a lid member 470b that closes the bottom surface of the support member 470. The support member 470 is provided with a cross-shaped groove 470s for passing through the main body substrate 450.

[0052] The outer circumferential surface of the operating part 460 is provided with a first longitudinal rib 460a, a second longitudinal rib 460b, a third longitudinal rib 460c, and a fourth longitudinal rib 460d, which extend vertically and are spaced at 90-degree intervals.

[0053] On the surface of the main circuit board 450, a sensor power switch 430, a first sensor 461, a second sensor 462, and a third sensor 463 are arranged at positions where the first longitudinal rib 460a, the second longitudinal rib 460b, the third longitudinal rib 460c, and the fourth longitudinal rib 460d face each other, respectively. A mechanical switch is used for the sensor power switch 430. The sensor power switch 430 includes an operation button 430b. The first sensor 461, the second sensor 462, and the third sensor 463 use photointerrupters in which the light-emitting part and the light-receiving part are integrated.

[0054] The first longitudinal rib 460a, provided on the circumferential surface of the operating part 460, is provided with a first protrusion 460a1 for controlling a sensor power switch 430 located at a corresponding position. Similarly, the second longitudinal rib 460b is provided with a second protrusion 460b1 for controlling a first sensor 461 located at a corresponding position. The third longitudinal rib 460c is provided with a third protrusion 460c1 for controlling a second sensor 462 located at a corresponding position. The fourth longitudinal rib 460d is provided with a fourth protrusion 460d1 for controlling a third sensor 463 located at a corresponding position.

[0055] When the operating part 460 protrudes most from the main circuit board 450, the first protrusion 460a1 is retracted to a position where it does not contact the operation button 430b of the sensor power switch 430. On the other hand, the second protrusion 460b1 protrudes to a position where it obstructs the sensor portion of the first sensor 461. Similarly, the third protrusion 460c1 protrudes to a position where it obstructs the sensor portion of the second sensor 462. The fourth protrusion 460d1 protrudes to a position where it obstructs the sensor portion of the third sensor 463.

[0056] Next, when the operating part 460 is pushed in the first step in the direction of arrow F shown in Figure 15 (first step pushed state), the first protrusion 460a1 comes into contact with the operation button 430b of the sensor power switch 430. As a result, the sensor power switch 430 is turned ON, and the first sensor 461, the second sensor 462, and the third sensor 463 are turned ON. In this way, by providing the sensor power switch 430, power consumption can be saved when the first sensor 461, the second sensor 462, and the third sensor 463 are OFF, similar to the case of Embodiment 1.

[0057] Next, when the operating part 460 is pressed in the second stage (second stage pressed state), the first recessed portion 460a1 remains in contact with the operation button 430b of the sensor power switch 430. The second recessed portion 460b1 opens the sensor part of the first sensor 461 (recessed state). As a result, the first sensor 461 enters a state where it can detect light reception. The second sensor 462 remains blocked by the third recessed portion 460c1 and does not detect light reception. The third sensor 463 also remains blocked by the fourth recessed portion 460d1 and does not detect light reception.

[0058] Furthermore, when the operating part 460 is pressed in to the third stage (third stage pressed state), the first recessed portion 460a1 remains in contact with the operation button 430b of the sensor power switch 430. The second recessed portion 460b1 remains in a state that opens the sensor part of the first sensor 461 (recessed state). Therefore, the first sensor 461 becomes capable of detecting light reception. The second sensor 462 becomes capable of detecting light reception as the third recessed portion 460c1 opens the sensor part (recessed state) (see Figure 17). As a result, the second sensor 462 becomes capable of detecting light reception. The third sensor 463 remains blocked by the fourth recessed portion 460d1 and does not detect light reception.

[0059] Furthermore, when the operating part 460 is pressed in to the fourth stage (fourth stage pressed state), the first recessed part 460a1 remains in contact with the operation button 430b of the sensor power switch 430. The second recessed part 460b1 remains in a state where the sensor part of the first sensor 461 is open (recessed). Therefore, the first sensor 461 remains in a state where it can detect light. The third recessed part 460c1 of the second sensor 462 becomes open (recessed). Therefore, the second sensor 462 remains in a state where it can detect light. The fourth recessed part 460d1 becomes open (recessed) the sensor part of the third sensor 463. Therefore, the third sensor 463 becomes in a state where it can detect light.

[0060] In this way, by sequentially changing the positions of the protrusions of the first protrusion 460a1, the second protrusion 460b1, the third protrusion 460c1, and the fourth protrusion 460d1, the detection order of each sensor can be changed according to the amount of pressure applied to the operating part 460.

[0061] (Control of the amount of contrast agent introduced) To control the amount of contrast agent introduced, a graph showing the bit signals shown in Figure 8 is used, similar to the variable hand switch 200 in Embodiment 2. Specifically, as shown in Figure 8, when the operating part 460 is pushed in to the second stage pressed state, the first sensor 461 turns ON and the amount of contrast agent introduced is controlled to the position in column L1.

[0062] Next, when the operating unit 460 is pushed in to the third stage of the pressed-in state, the first sensor 461 and the second sensor 462 turn ON and are controlled to the amount of introduction of the position of column L2.

[0063] Next, when the operating unit 460 is pushed in to the fourth stage of the pressed-in state, the first sensor 421, the second sensor 462, and the third sensor 463 are turned ON, and the amount of movement in the position of column L7 is controlled.

[0064] Even with this configuration, by moving the actuation unit 460 toward the main circuit board 450 against the elastic force of the coil spring 480, or moving toward the main circuit board 450 by allowing the elastic force of the coil spring 480 to take over, multiple sensor members are sequentially controlled according to the amount of movement of the actuation unit 460, and a bit signal is output to the injector head 20, which is the main device. As a result, similar to the variable hand switch 100 of Embodiment 1, it is possible to reduce the number of parts, enabling cost reduction and disposability required for the variable hand switch 400.

[0065] While various embodiments of this technology have been described above, the embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of this technology is defined by the claims, and all modifications within the meaning and scope of the claims are intended to be included. [Explanation of symbols]

[0066] 11 Control switch cover, 13 Salt injection switch cover, 20 Injector head, 50 Battery, 100, 200, 300, 400 Variable hand switch, 100a Top cover case, 100b Main body case, 110, 270, 350 Operating plate, 110a Locking piece, 110b, 120b Elastic spring support pin, 120, 250, 380, 450 Main circuit board, 120a Notch, 120s Bit plate through hole, 130 Salt injection switch, 130b, 150b, 430b Operation button, 140 Elastic spring, 150, 430 Sensor power switch, 161, 210, 310, 421, 461 First sensor, 161a, 162a, 163a, 164a Light-emitting element, 161b, 162b, 163b, 164b Light-receiving element, 162, 220, 320, 462 Second sensor, 163, 230, 330, 463 Third sensor, 164, 240, 340 Fourth sensor, 180 Bit plate, 180a Contact part, 180h, 450s Through hole, 251, 470 Support member, 260, 370 Contrast-imaging button, 340s Fixing ring, 350a Pivot shaft, 360 Upper and lower sliding rod, 390 Fixing block, 390a Bearing hole, 460 Operating part, 460a First longitudinal rib, 460a1 First uneven part, 460b1 Second uneven part, 460b Second longitudinal rib, 460c Third longitudinal rib, 460c1 Third uneven part, 460d Fourth longitudinal rib, 460d1; Fourth protrusion, 470b; Cover member, 470s; Cross-shaped groove, 480; Coil spring.

Claims

1. A battery-powered, disposable variable hand switch that transmits control signals to the main unit via infrared communication, A main board positioned at a distance from the main body device, An operating plate is rotatably supported with respect to the main substrate and biased in a direction away from the main substrate, The device comprises a plurality of sensor members arranged on the main circuit board, and a mechanical power switch for powering on the plurality of sensor members. The operating plate integrally comprises a bit plate with a plurality of through holes arranged therein and a contact portion for operating the power switch. Depending on the amount of pressure applied to the operating plate, the contact portion first turns on the power switch to supply power to the multiple sensor members, and then, with further pressure, a bit signal based on the combination of multiple through holes in the bit plate is transmitted via infrared communication as a multi-stage injection speed control signal. Variable hand switch.

2. The plurality of through holes in the bit plate are arranged such that, in a stepwise change corresponding to the amount of rotation of the operating plate, the change in the bit signal between adjacent steps is always only one bit. The variable hand switch according to claim 1.

3. The bit plate has a fan shape centered on the pivot point of the operating plate and is configured to pass through the bit plate through hole provided in the main substrate and traverse between the plurality of sensor members. A variable hand switch according to claim 1 or claim 2.

4. The main unit is an injector head for injecting a contrast agent, and the bit signal is a signal for adjusting the injection speed of the contrast agent in multiple stages. A variable hand switch according to claim 1 or claim 2.

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