Transmitter

Abstract

To make it possible to easily replace a surface skin in a transmitter in which a surface skin made of woven fabric is attached to a front face of an outer surface cover and a center portion is held down by an outer protective plate.SOLUTION: A transmitter is configured in that: a surface skin made of woven fabric is attached to a front face, and an outer protective plate is disposed in a center of an outer surface cover provided in a front portion of a transmitter main body portion; an opening is formed in the center of the surface skin, into which a rod portion of the outer protective plate can be inserted; the rod portion of the outer protective plate is inserted into the opening; a center portion of the surface skin is pressed down; the surface cover is configured to be convertible by a coupling member between a first state in which the surface cover is coupled to a front portion of a main body portion and a second state in which the surface cover is separated from the front portion of the main body portion; locking means for permitting the rod portion to move inward and preventing the rod portion from moving outward is provided; a mechanism is provided in which, when the outer surface cover is in a first state, the rod portion is prevented from turning in an axial direction, and, when the outer surface cover is in a second state, the outer surface cover allows the rod portion to turn; and the mechanism is configured in which when the mechanism is in the second state and the rod portion is turned, the locking means is released, allowing the rod portion to move outward.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a transmitter and an activation device (hereinafter referred to as a transmitter) of an alarm that is installed on a wall portion or the like of a building and emits an alarm when operated in the event of an emergency.

Background Art

[0002] Conventionally, inside a building, a manual transmitter equipped with a push-button switch is installed on the wall surface at an appropriate height to notify the occurrence of an emergency such as a fire. In the event of an emergency, the discoverer strongly presses the push button of the transmitter to turn on the internal switch, so that a signal notifying the occurrence of the emergency is transmitted to a receiver or the like, and an alarm sound is emitted from a bell provided near the transmitter, enabling the people around to be notified of the occurrence of the emergency.

[0003] Also, conventionally, a transmitter is generally configured separately from an indicator lamp for notifying the presence of fire-related equipment (including the transmitter). On the other hand, in recent years, an invention related to an indicator lamp integrated type transmitter in which an indicator lamp is integrally provided on the front side of the transmitter body has been proposed (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The transmitter with an indicator light described in Patent Document 1 is configured such that an arc-shaped light-emitting portion is disposed around the transmitter, and the light-emitting portion functions as a position indicator light that notifies the presence of the transmitter when it emits light. The front surfaces of the transmitter and the surrounding light-emitting portion are formed flat. Therefore, it has an inorganic appearance, and there is a demand for a transmitter that has an appearance that does not cause a sense of incongruity even when installed on the wall surface of a building with a highly designed interior that has become popular in recent years.

[0006] Therefore, the applicant of the present application developed an indicator light integrated transmitter provided with a display portion capable of emitting light over the entire surface by covering the front surface of an outer cover having an opening in the center where a protective plate (push button) is disposed with a cover member having a skin made of fabric and having translucency. However, it was found that it is very difficult to attach the skin in a state of being stretched on the surface of the cover member. Therefore, a protective plate having a rod portion on the back surface and arranged so as to be located outside the push button switch is used, a skin made of fabric (woven fabric) is attached to the surface of the outer cover, an opening is provided in the center of the skin, the rod portion of the protective plate is inserted through this opening, and the present invention relates to a transmitter configured to apply tension to the skin by pressing the skin with the back surface of the pressing portion, and a prior application was filed (Japanese Patent Application No. 2023-027960).

[0007] However, in the transmitter according to the above prior application invention, since the skin attached to the surface of the outer cover is made of cloth, dust around, dirt on the hands, paint of wall surface painting, etc. may adhere, or damage such as tearing may occur, resulting in the problem that the skin needs to be replaced. The present invention has been made paying attention to the above problems, and an object thereof is to make it possible to easily replace the skin in a transmitter in which a skin made of woven fabric is attached to the surface of an outer cover and the central portion is pressed by an outer protective plate.

Means for Solving the Problems

[0008] In order to solve the above problems, the present invention A main body incorporating a push button switch that is turned on by a pressing operation from the outside, an outer cover disposed outside the main body, and an outer protection plate having a rod portion on the back surface and disposed so as to be located outside the push button switch. In a transmitter configured such that the rod portion moves when the outer protection plate is pushed in to turn on the push button switch, The outer cover includes a skin made of a woven fabric attached to the outer surface, and an opening is formed at the center for disposing the outer protection plate. An opening through which the rod portion can be inserted is formed at the center of the skin, and the center portion of the skin is configured to be pressed at the back surface of the outer protection plate when the rod portion is inserted through the opening. The outer cover is configured to be convertible between a first state in which the outer cover is joined to the front portion of the main body by a connecting member interposed between the outer cover and the main body, and a second state in which the outer cover is separated from the front portion of the main body. Locking means for allowing inward movement of the rod portion and preventing outward movement of the rod portion, and a mechanism that makes rotation of the rod portion around its axis impossible when the outer cover is in the first state and makes rotation of the rod portion around its axis possible when the outer cover is in the second state. When the rod portion is rotated in the second state, the locking means is disengaged to allow outward movement of the rod portion.

[0009] According to the transmitter having the above configuration, in a transmitter in which a skin made of a woven fabric is attached to the surface of the outer cover and the central portion is pressed by the outer protection plate (push button), the outer protection plate can be easily removed from the outer cover by a simple operation. Therefore, when the skin is soiled or damaged, the skin can be easily replaced. Also, in a state where the outer cover is joined to the front portion of the main body of the transmitter, it is possible to prevent the outer protection plate from being removed from the outer cover, so that it is possible to prevent mischievous removal of the outer protection plate.

[0010] Here, preferably, the locking means includes a locking claw provided on the side of the main body portion and configured to lock the rod portion of the outer protection plate inserted into the opening of the skin to prevent it from coming off. On the outer peripheral surface or the peripheral wall of the rod portion of the outer protection plate, a groove or a slit is formed, into which the tip of the locking claw is engaged. In the second state, when the rod portion is rotated, the tip of the locking claw is disengaged from the groove or the slit, and when the rod portion is rotated in the reverse direction, the tip of the locking claw can be engaged with the groove or the slit. According to such a configuration, the outer protection plate can be removed from the outer surface cover or the skin can be pressed against the back surface of the outer protection plate by a simple operation of rotation.

[0011] Also, preferably, the locking claw extends in the axial direction of the rod portion of the outer protection plate. The groove includes a rectangular portion having a pair of side walls that guide both side portions of the tip of the locking claw along the axial direction of the rod portion, and an extension portion in which a flat bottom wall of the groove extends in a direction orthogonal to the side walls of the rectangular portion at an end portion on the pressing portion side of the outer protection plate of the rectangular portion. The extension portion is configured such that the tip of the locking claw is not positioned when the outer protection plate is pushed in the first state, and is provided at a location where the tip of the locking claw is positioned when the outer protection plate is pushed in the second state. According to such a configuration, by simply providing a relatively simple structure on the outer protection plate, the replacement of the skin can be easily performed, and an increase in cost associated with providing the above functions can be suppressed.

[0012] Furthermore, preferably, a plurality of the locking claws and the grooves or slits are provided around the axis of the rod portion. According to such a configuration, the operation of removing the outer protection plate from the outer surface cover can be stably performed.

Advantages of the Invention

[0013] According to the transmitter of the present invention, in a transmitter in which a skin made of woven fabric is adhered to the surface of an outer cover and the central portion is pressed by an outer protection plate, when the skin becomes dirty or damaged, there is an effect that the skin can be easily replaced.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0015] Hereinafter, with reference to the drawings, an embodiment of a fire alarm transmitter to which the present invention is applied will be described. The fire alarm transmitter of the present embodiment (hereinafter simply referred to as a transmitter) has a function of sending a signal notifying the occurrence of an abnormality to a fire receiver by strongly pressing a push button provided on the front surface to turn on an internal switch when an abnormality such as a fire occurs, and is configured to be installed and used on a building wall or a door of a fire hydrant box.

[0016] FIG. 37 is an overall perspective view of the transmitter according to an embodiment of the present invention, FIG. 2 is a cross-sectional perspective view showing the internal structure in a state where the outer cover of the transmitter shown in FIG. 1 is moved forward, and FIG. 3 is an exploded perspective view of the transmitter. As shown in FIG. 1, the transmitter of this embodiment includes a transmitter main body 10 having a box-shaped storage case 13 with an opening provided at the front and a push button switch inside, and a push button (outer protection plate) 21 that protects the push button switch located inward of the center of the outer surface, and has a light emitting portion 22 that functions as a position indicator light around it, and is composed of a disk-shaped outer surface cover 20 coupled to the front portion of the transmitter main body 10. In this specification, the side with the outer surface cover 20 is referred to as the outside or the front.

[0017] As shown in FIGS. 2 and 3, the transmitter main body 10 includes a box-shaped storage case 13 having a push button type switch 11 and a telephone jack 12 for inserting the plug at the tip of the cord of the handset built therein. In front of (leftward in the figure) the push button type switch 11 in the storage case 13, a disk-shaped inner protection plate 14 is disposed so as to be movable back and forth, and a compression spring 15 that biases the inner protection plate 14 forward is disposed on the back of the inner protection plate 14. Also, in the storage case 13, a circuit board 16 that detects that the push button type switch 11 has been turned on and sends a signal to the outside is disposed. The transmitter main body 10 is attached such that the flange-shaped plate portion 13a at the front end of the storage case 13 is joined to the installation surface.

[0018] On the other hand, the outer surface cover 20 includes a disk-shaped light guide plate base 22A coupled to cover the outer surface side opening of the storage case 13, a light guide plate 22B joined to the outer surface of the light guide plate base 22A, and a cover member 22C joined to the outer surface of the light guide plate 22B. And at the center of this outer surface cover 20, a push button 21 as an outer protection plate that protects the push button switch 11 is disposed, and a rod portion 21a that protrudes inward is formed on the back surface of the push button 21.

[0019] Further, the light guide plate base 22A of the outer surface cover 20 has a mortar-shaped portion 22b having a double cylindrical engaging portion 22a with a U-shaped cross section on the inner end side, and further has a disk-shaped outer flat portion 22c around it, and a eaves portion 22d bent inward is formed on the periphery of the outer flat portion 22c. Further, a base member 25 is disposed on the back of the light guide plate base 22A. A cylindrical portion 25a that protrudes outward and inward is provided at the center of the base member 25. The rod portion 21a formed on the back surface of the push button 21 is inserted through the cylindrical portion 25a, and the rear end of the rod portion 21a can abut against the front surface of the inner protection plate 14. Further, a cylindrical engaging wall 25d that engages with the cylindrical engaging portion 22a of the light guide plate base 22A is provided at the peripheral edge of the front surface of the base member 25.

[0020] Also, an LED substrate 24 on which a plurality of light emitting elements (LEDs: light emitting diodes) 23 that function as light sources are mounted with their emission portions facing outward is disposed on the front surface of the base member 25. The push button 21, the light guide plate 22B of the light emitting portion 22, and the cover member 22C are formed of a light guide material having light transmissibility such as an acrylic resin, and are configured to perform light emission display by guiding the light from the plurality of light emitting elements 23 mounted on the LED substrate 24 and emitting it to the front surface.

[0021] Furthermore, a slide plate 26 that slides along the upper surface of the bottom wall 13b is provided at the lower part of the storage case 13. Specifically, rib-shaped guide rails are provided parallel to the bottom wall 13b on the inner surface of the side wall of the storage case 13, and the side end portion of the slide plate 26 engages with a groove formed by the guide rail and the bottom wall of the storage case 13, so that it is configured to be movable in the front-rear direction while maintaining a horizontal posture.

[0022] Also, a connecting member 27 for connecting the slide plate 26 and the light guide plate base 22A is tiltably attached to the front end of the slide plate 26 with a pin inserted through the lower end as a rotation axis. The outer surface cover 20 is configured to be able to approach and separate from the transmitter main body portion 10 in the front-rear direction by the slide plate 26 and the connecting member 27. And, an engaging claw 25c is provided on the back surface of the base member 25, and the base member 25 and the connecting member 27 are coupled by the engaging claw 25c engaging with an engaging portion 27c provided on the connecting member 27.

[0023] Further, on the back surface of the light guide plate base 22A, engaging claws similar to the engaging claws 25c are provided at locations not shown in FIGS. 2 and 3. These engaging claws engage with an engaging portion (claw receiver) 13c provided at a corresponding portion on the front surface of the flange-like plate portion 13a of the transmitter main body portion 10 shown in FIG. 3, whereby the outer surface cover 20 is integrally coupled to the transmitter main body portion 10. Specifically, the engaging claws and the engaging portion 13c (not shown) are configured to be engaged by rotating the outer surface cover 20 by a predetermined angle after joining the outer surface cover 20 to the front surface of the transmitter main body portion 10 with their positions shifted in the circumferential direction.

[0024] Furthermore, as shown enlarged in FIG. 4, a pair of locking claws 25b are formed on the inner peripheral surface of the cylindrical portion 25a of the base member 25, and a pair of grooves 21b are formed on the outer periphery of the rod portion 21a of the push button 21 such that the locking claws 25b are axially movably engaged therewith. The rear end portion of the groove 21b is closed and has a step (wall body). When the push button 21 moves outward by the restoring force of the compression spring 15, the step abuts against the locking claw 25b, thereby preventing further outward (forward) movement. That is, it functions as a position regulating means for regulating the outward protrusion of the push button 21.

[0025] On the other hand, in the center of the light guide plate 22B, a circular opening 22i through which the rod portion 21a of the push button 21 is inserted is formed. The light guide plate 22B has a mortar-shaped portion in the center and a flat portion forming an annular shape around it, corresponding to the shape of the light guide plate base 22A. A short cylindrical eaves portion 22j bent inward is formed at the periphery of the flat portion. Furthermore, a light incident surface is formed at the rear end of the edge of the central opening 22i of the light guide plate 22B, and the light emitting portion of the light emitting element 23 is disposed so as to face the light incident surface. The plurality of light emitting elements 23 are annularly disposed corresponding to the light incident surface at the edge of the opening 22i.

[0026] The rod portion 21a of the push button 21 is movable back and forth along the inner peripheral surface of the cylindrical portion 25a of the base member 25. When the pressing portion on the outer surface of the push button 21 is pressed with a finger, the rod portion 21a moves inward, and the rear end surface moves the inner protection plate 14 in the storage case 13 inward. The protrusion 14a at the center of the back surface of the inner protection plate 14 hits the actuator of the push button switch 11 to turn on the switch. Although not particularly limited, the push button 21 is formed of a light-transmissive material. A part of the light emitted from the light-emitting element 23 enters from the back of the push button 21 and is emitted from the outer surface, so that the surface of the push button 21 emits light.

[0027] In this embodiment, the cover member 22C of the outer cover 20 is formed of a soft material having light-transmittance such as silicone resin and capable of holding its shape. The surface of this shape-retaining member is covered with a skin 22k made of a fabric (woven fabric) or the like made of a material having flexibility, heat resistance, and elasticity, such as meta-aramid fiber. The cover member 22C is formed so as to cover the eaves portion 22j at the outer edge of the light guide plate 22B from the side portion to the back portion.

[0028] Thereby, even if an external impact is applied to the cover member 22C, the shape-retaining member deforms to absorb the impact, preventing surface damage, and is configured to enhance the visibility from the side of the transmitter by the light emission from the eaves portion 22j. Further, since the surface of the shape-retaining member is covered with the skin 22k made of a fabric, it is possible to give a soft and hazy texture by diffusing or transmitting the light guided by the light guide plate 22B and emitting it outward. The skin 22k of the cover member 22C is made of a material knitted in a way that can exhibit stretchable properties.

[0029] Further, although the inner edge of the shape-retaining member of the cover member 22C stops near the outer periphery of the push button 21, the skin 22k is formed to extend further inward. And, an opening having the same size as the outer diameter of the rod portion 21a of the push button 21 is formed at the center of the skin 22k, and the rod portion 21a is inserted through this opening. Thereby, a configuration is adopted in which the center of the skin 22k is pressed toward the storage case 13 side by the back surface of the flange portion of the push button 21. At this time, the skin 22k is pulled inward and stretched, and the tension prevents the skin 22k from sagging and causes the entire cover member 22C to be joined in a state of being in close contact with the front surface of the light guide plate 22B.

[0030] By the way, in the transmitter having the above-described configuration, since the skin 22k adhered to the outer surface of the cover member 22C is made of cloth, dust around, dirt on the hand, paint of wall surface painting, etc. may adhere, or damage such as tearing may occur, so that the skin needs to be replaced. Therefore, in the transmitter of the present embodiment, the rod portion 21a of the push button 21 that presses the center of the skin 22k is configured to be removable from the base member 25. Hereinafter, its specific configuration will be described with reference to FIG. 5. In FIG. 5, (A) shows a state in which the rod portion 21a of the push button 21 is locked to the base member 25, and (B) shows a state in which the rod portion 21a is removed from the base member 25.

[0031] As described above, a pair of grooves 21b are formed on the outer peripheral surface of the rod portion 21a of the push button 21, and the tips of a pair of locking claws 25b provided on the base member 25 are engaged therewith. As shown in FIG. 5(B), the groove 21b has the same width as the width of the locking claw 25b and has a long rectangular shape in the axial direction, and the side wall 21d of the groove 21b functions as a guide for the locking claw 25b when the push button 21 is operated. Also, at the end of the rod portion 21a of the groove 21b on the side opposite to the tip, a bottom wall extension portion 21c is provided where the flat bottom wall of the groove 21b extends straight in a direction orthogonal to the side wall 21d up to the outer peripheral surface of the rod portion 21a, serving as one side wall of the guide groove. Thus, the groove 21b and the bottom wall extension portion 21c are formed to be substantially L-shaped. Although not shown in Fig. 5(B), similar grooves 21b and bottom wall extension portions 21c are also provided on the opposite side of the outer peripheral surface of the rod portion 21a. Also, if space permits, the grooves 21b and the bottom wall extension portions 21c may be provided at three or more locations.

[0032] Furthermore, the groove 21b is formed such that when the push button 21 is pressed to move the rod portion 21a and the switch 11 in the transmitter main body portion 10 is turned on, the tip of the locking claw 25b does not reach the bottom wall extension portion 21c. Thus, in a state where the outer cover 20 is joined to the front surface of the transmitter main body portion 10, the tip of the rod portion 21a abuts against the switch 11 and further movement is blocked. And in that state, since the side surface of the locking claw 25b is in contact with the side wall 21d of the groove 21b, rotation of the rod portion 21a, that is, the push button 21, can be prevented.

[0033] On the other hand, when the outer cover 20 is separated from the front surface of the transmitter main body portion 10, the rod portion 21a can be moved further inward, so that the locking claw 25b moves to a location where the bottom wall extension portion 21c is present. And since there is no side wall at this location, the rod portion 21a can be rotated. As it rotates, the locking claw 25b is pushed against the bottom wall extension portion 21c and elastically deformed, causing the tip to disengage from the groove 21b. Thus, the rod portion 21a can be pulled out from the cylindrical portion 25a of the base member 25, and the skin 22k can be replaced.

[0034] Next, the method of fixing the outer edge portion of the skin 22k made of woven fabric constituting the cover member 22C will be described with reference to Figs. 4 and 6. As shown in FIG. 4, the peripheral portion of the skin 22k is sewn in a bag shape, and a ring-shaped elastic body 29 made of a circular rubber string or a ring spring as shown in FIG. 6 is housed in the bag-shaped sewing portion 28. The diameter of the ring-shaped elastic body 29 in its natural state is set to be sufficiently smaller than the diameter of the light guide plate 22B.

[0035] Also, as shown in FIG. 6, the peripheral portion of the skin 22k covers the side portion of the eaves portion 22j of the outer edge portion of the light guide plate 22B and is folded back to the back portion. And at this time, since the ring-shaped elastic body 29 is in a stretched state, the peripheral portion of the skin 22k is constricted toward the center side by the force of the ring-shaped elastic body 29 trying to shrink, and tension is applied to the skin 22k. As a result, the skin 22k can fix the shape-retaining member of the cover member 22C and the light guide plate 22B to the outer surface of the light guide plate base 22A. In FIG. 6, in order to illustrate the bag-shaped sewing portion 28 at the periphery of the skin 22k, the plate portion 13a of the transmitter main body portion 10 is drawn smaller than that in FIG. 2, but it may be sized so as to cover the bag-shaped sewing portion 28 from the rear.

[0036] As described above, the transmitter of the present embodiment is configured such that the rod portion 21a of the push button 21 can be removed from the base member 25, and a bag-shaped sewing portion 28 is provided at the peripheral portion of the skin 22k and the ring-shaped elastic body 29 is housed therein to have a structure that can expand and contract. Therefore, the skin 22k can be replaced by pulling out the push button 21 that presses the central portion of the skin 22k. Further, after that, the rod portion 21a of the push button 21 is inserted into the cylindrical portion 25a of the base member 25 and rotated in the opposite direction to engage the locking claw 25b with the groove 21b on the outer peripheral surface of the rod portion 21a, so that the central portion of the skin 22k can be pressed and fixed.

[0037] As described above, the present invention has been explained based on the embodiments, but the present invention is not limited to the above embodiments. For example, in the above embodiment, the groove 21b on the outer peripheral surface of the rod portion 21a of the push button 21 is formed in an L shape. However, the groove 21b may be formed straight, and a tapered portion may be provided on the front end side of the bottom surface of the groove 21b (the side closer to the flange portion of the push button 21) so as to approach the height of the outer peripheral surface of the rod portion 21a as it approaches the flange portion. Thereby, at the time of assembly, the locking claw 25b is engaged with the groove on the side having the wall body serving as a stopper, and at the time of skin replacement, by pushing in the rod portion 21a, the tip of the locking claw 25b is expanded outward and then rotated, so that the locking claw 25b can be moved to a portion without the measuring wall 21d and the push button 21 can be pulled out.

[0038] Furthermore, in the above embodiment, the rod portion 21a is configured by a rod-shaped member, but it may be a cylindrical member. And in that case, a slit is formed instead of the groove 21b. And when a slit is provided instead of the groove 21b, it is preferable to form a guide wall corresponding to the bottom wall extension portion of the above embodiment on the inner side of the slit, that is, on the side closer to the flange portion of the push button 21, so as to extend in a direction orthogonal to the side wall 21d of the groove 21b.

[0039] Also, in the above embodiment, a bag-shaped sewing portion is provided at the periphery of the skin 22k of the cover member 22C, and a ring-shaped elastic body is housed therein, and the bag-shaped sewing portion is narrowed inward by its elastic force to show a configuration in which the cover member 22C is attached to the light guide plate base 22A and the light guide plate 22B. However, a hook for hooking the skin 22k may be provided on the light guide plate base 22A. Also, instead of the ring spring, a string may be passed through and tightened in the bag-shaped sewing portion, or the edge of the skin 22k may be fixed to the light guide plate base 22A with a screw. Furthermore, in the above embodiment, the rod portion 21a of the push button (outer protection plate) 21 presses the inner protection plate 14, and the inner protection plate 14 is configured to turn on the push button switch 11. However, the inner protection plate 14 may be omitted and the rod portion 21a of the push button (outer protection plate) 21 may be configured to turn on the push button switch 11.

[0040] In addition, in the above-described embodiment, a transmitter with an integral display lamp has been described. However, the present invention can also be applied to a transmitter without a display lamp. Further, in the above-described embodiment, the outer cover 20 is circular in a front view, but it may be elliptical or polygonal. Furthermore, in the above-described embodiment, the present invention has been described as being applied mainly to a fire transmitter that constitutes a fire alarm system. However, the present invention is not limited to a fire transmitter, and can be widely used for transmitters for emergency train notifications installed on railway platforms and level crossings, and transmitters for emergency calls installed in toilets, bathrooms, etc.

Explanation of Reference Numerals

[0041] 10 Transmitter main body 11 Push button switch 12 Telephone jack 13 Storage case 13a Flange-shaped plate portion 14 Inner protection plate 15 Compression spring 16 Circuit board 20 Outer cover 21 Push button (outer protection plate) 21a Rod portion 21b Groove 22 Light-emitting portion 22A Light guide plate base 22B Light guide plate 22C Cover member 22a Engagement portion of the main body plate 22b Mortar-shaped portion of the main body plate 22c Outer flat portion of the main body plate 22d Eaves portion of the main body plate 22i Opening 22j Eaves portion 22k Epidermis 23 Light-emitting element (LED) 24 LED substrate 25 Base member 25a Cylindrical portion 25b Locking claw 26 Slide plate 27 Connecting member 28 Bag-shaped sewing part 29 Ring-shaped elastic body (ring spring)

Claims

1. A transmitter comprising: a main body incorporating a push button switch that is turned on by a pressing operation from the outside; an outer cover disposed outside the main body; and an outer protection plate disposed outside the push button switch and having a rod portion on the back surface, wherein the rod portion moves when the outer protection plate is pushed in to turn on the push button switch, the outer cover includes a skin made of a woven fabric attached to the outer surface, and an opening is formed in the center for disposing the outer protection plate, an opening through which the rod portion can be inserted is formed in the center of the skin, and the center portion of the skin is pressed against the back surface of the outer protection plate when the rod portion is inserted through the opening, the outer cover is configured to be convertible between a first state in which the outer cover is joined to the front portion of the main body by a connecting member interposed between the outer cover and the main body and a second state in which the outer cover is separated from the front portion of the main body, locking means for allowing inward movement of the rod portion and preventing outward movement of the rod portion, and a mechanism for disabling rotation of the rod portion in the axial direction when the outer cover is in the first state and enabling rotation of the rod portion in the axial direction when the outer cover is in the second state, The transmitter is characterized in that when the rod portion is rotated in the second state, the locking means is disengaged to allow outward movement of the rod portion.

2. The locking means includes a locking claw provided on the side of the main body for locking and preventing removal of the rod portion of the outer protection plate inserted into the opening of the skin, a groove or slit for engaging the tip of the locking claw is formed on the outer peripheral surface or the peripheral wall of the rod portion of the outer protection plate, The transmitter according to claim 1, wherein when the rod portion is rotated in the second state, the tip of the locking claw is disengaged from the groove or slit, and when the rod portion is rotated in the reverse direction, the tip of the locking claw can be engaged with the groove or slit.

3. The locking claw extends in the axial direction of the rod portion of the outer protection plate, The groove includes a rectangular portion having a pair of side walls that guide both side portions of the tip of the locking claw along the axial direction of the rod portion, and an extending portion provided at an end of the rectangular portion on the side of the pressing portion of the outer protection plate, where a flat bottom wall of the groove extends in a direction orthogonal to the side walls of the rectangular portion. The transmitter according to claim 2, wherein the extending portion is provided at a location where the tip of the locking claw is not positioned when the outer protection plate is pushed in the first state, and the tip of the locking claw is positioned when the outer protection plate is pushed in the second state.

4. The transmitter according to claim 2 or 3, wherein a plurality of the locking claws and the grooves are provided around the axis of the rod portion.

Images