JPS6240504Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a push button device, and more particularly to a mounting structure for a button frame that guides a push button.

First, a conventional push button device will be explained with reference to FIGS. 1 to 3.

For example, an elevator car typically has a
A floor indicator board as shown in the figure is provided. 1
2 is a mounting plate, 2 is a push button for floor indication, 3 is a direction indicator light, and 4 is a case on the back side of the mounting plate 1. The structure of the push button portion of such a floor indicator board is as shown in FIGS. 2 and 3. That is, a push button device 5 is attached to the mounting plate 1, and a corresponding display device 6 is attached to the case 4.

The push button device 5 includes a push button 2 and a button frame 7 that guides the push button 2 in a pressing direction. The button frame 7 is made up of two members: a front button frame 7A and a back button frame 7B. The front button frame 7A is formed by integrally forming a frame main body part 7Aa that is inserted into the frame hole 8 of the mounting plate 1 and a flange part 7Ab that comes into contact with the back side of the mounting plate 1. Further, the back button frame 7B is integrally formed with a frame body part 7Bb that is slightly larger than the frame body part 7Aa, a flange part 7Bb that comes into contact with the flange part 7Ab, and a projecting edge 7Bc that projects inwardly of the frame body part 7Ba. This is what I did.

On the other hand, a stud bolt 9 is embedded in the mounting plate 1, and the stud bolt 9 passes through the flange portions 7Ab, 7Bb, and by tightening the nut 10 thereto, the two button frames 7A, 7B is fixed to the mounting plate 1.

The push button 2 has a flange portion 2a that engages with a shoulder within the button frame 7 to prevent it from coming off. Further, the push button 2 is made of light-transmitting plastic, and characters 11 are formed on the back surface of the push-button 2 using a light-impermeable material. On the back side of the push button 2, there is a back plate 12 and a shade 13.
is provided. A flange portion 13a is also formed on the shade 13, and this engages with the protrusion 7Bc of the button frame 7, thereby preventing the shade 13 from slipping out from the button frame 7.

The display device 6 also includes a switch block 14 fixed to the case 4, and a switch block 14 fixed to the case 4.
The lamp holder 15 has a lamp holder 15 that is guided by the push button 4 in the direction in which the push button 2 is pressed, and a lamp 16 that is attached to the lamp holder 15. The shade 13 is in contact with the front side of the lamp holder 15 so as to surround the lamp 16. Further, within the switch block 14, a spring 17 biased to push the lamp holder 15 back toward the push button 2, and a contact 18 that opens and closes depending on the displacement of the lamp holder 15 are installed.

The operation is as follows.

When the push button 2 is pressed, the lamp holder 15 is displaced in the pressing direction together with the back plate 12 and shade 13, and the contact 18 is closed. Then, the lamp 16 is turned on by a circuit (not shown) and is self-maintained. This self-holding is released when the elevator car arrives at the designated floor.

Although the above describes a push button device used in an elevator floor indicator panel, push button devices used for other purposes also have a similar structure.

However, the conventional push button device having such a structure has the following drawbacks. That is, in the conventional push button device, in order to fix the button frame to the mounting plate, it is necessary to insert stud bolts into the back side of the mounting plate, which makes manufacturing the mounting plate cumbersome. Furthermore, since the button frame consists of two members, which are fastened together using stud bolts and nuts, assembly is also troublesome. Furthermore, since the button frame is inserted from the back side into the frame hole of the mounting plate, the outline of the frame hole will be visible on the surface of the mounting plate, so the frame hole must be finished accurately taking into consideration the appearance. This also makes manufacturing the mounting plate troublesome.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a push button device that is easy to manufacture with a mounting plate, simple in structure and assembly, and has an excellent design that can be installed reliably.

In order to achieve this purpose, the present invention includes a button frame that guides a light-transmissive push button in a pressing direction, which is attached to a frame hole of a mounting plate, and a button frame that guides a light-transmissive push button in a pressing direction. In a push button device in which a shade of a lamp that is illuminated from above is disposed, a portion of the button frame that protrudes to the front side of the mounting plate includes a portion that protrudes outward from the frame hole and engages with the edge of the front side of the frame hole. A stopper that covers the entire circumference of the front edge of the frame hole, and a protrusion that protrudes inwardly from the frame hole to cover the outer periphery of the push button and prevent the push button from coming off are formed, and The part protruding from the back side of the mounting plate engages with the outer wall of the button frame,
At least two leaf springs are provided, the spring action portions of which abut against the back surface of the mounting plate and bias the button frame to the back side of the mounting plate, and a portion of the button frame protrudes from the back side of the mounting plate. A slit is formed in the leaf spring, and a pawl is formed in the leaf spring that penetrates the slit and projects into the button frame, so that the pawl prevents the shade from coming out of the button frame, and the leaf spring An insertion piece is formed to be inserted between the inner surface of the frame hole and the outer surface of the button frame, and the plate spring is biased on the outside of the plate spring so as to be attached to the outer wall of the button frame. It is characterized by the provision of a presser spring.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 4 to 8. In FIG. 4, the same reference numerals as in FIG. 2 indicate the same or equivalent components.

The major difference between this embodiment and the conventional example is that the button frame 7 is an integral piece having a substantially rectangular cylindrical shape. Therefore, it is fixed to the mounting plate 1. That is, the part of the button frame 7 that protrudes from the back side of the mounting plate 1 is straight, and
A stopper 7d that engages with the edge of the frame hole 8 is formed around the entire circumference of the portion that projects toward the front side.
(See FIG. 6) Furthermore, a protrusion 7e for preventing the push button 2 from coming off is formed inward at the front end of the button frame 7, and a claw for a leaf spring 19 (described later) is provided near the back end.
A slit 7f is formed through which the slit 7f passes.

Two leaf springs 19 are provided on the outside of a portion of the button frame 7 that protrudes to the back side of the mounting plate 1, facing each other. The shape of this leaf spring 19 is shown in FIG. Two spring action parts 19a curled away from the button frame 7 are formed at one end of the leaf spring 19, and a straight insertion piece 19b is formed between them. Further, at the other end, two spring receiving pieces 19c are formed which are bent in the same direction as the spring action part 19a, and between them there is formed a claw 19d which is bent in the opposite direction.

As shown in FIGS. 4 and 5, this leaf spring 19 is brought into contact with the outer wall of the button frame 7, its claw 19d penetrates the slit 7f and projects into the button frame 7, and the insertion piece 19b The spring action part 19a is inserted between the inner surface of the frame hole 8 of the mounting plate 1 and the outer surface of the button frame 7, and further, the spring action part 19a comes into contact with the back side of the mounting plate 1 and pulls the button frame 7 to the back side of the mounting plate 1. It is biased so that
That is, the button frame 7 is fixed to the mounting plate 1 by the retraction force of the leaf spring 19 and the opposing engagement of the stopper 7d with the edge of the frame hole 8. The claw 19d projecting inside the button frame 7 acts as a retaining piece to prevent the shade 13 from slipping out to the back side, and the insertion piece 19b functions to stabilize the attached state of the leaf spring 19.

A presser spring 20 is provided on the outside of the leaf spring 19 and is biased so as to press it against the outer wall of the button frame 7. As shown in FIGS. 5 and 8, this presser spring 20 is shaped to hold the button frame 7 together with the leaf spring 19 from the outside, and has the function of stabilizing the attached state of the leaf spring 19. to do. Note that the spring receiving piece 19c of the leaf spring 19 is for preventing the presser spring 20 from coming off.

The configuration other than this is the same as the conventional example shown in FIG. 2, so a description thereof will be omitted.

Next, how to assemble this push button device will be explained.

First, insert the button frame 7 into the frame hole 8 of the mounting plate 1 from the front side, insert the push button 2, back plate 12, and shade 13 into the button frame 7 from the back side, and then attach the leaf spring to the outer wall of the button frame 7. 19 and inserting the insertion piece 19b between the inner surface of the frame hole 8 and the outer surface of the button frame 7, the claw 19d enters the slit 7f. In this state, the spring action portion 19a comes into contact with the back side of the mounting plate 1 and has a repulsive force. In this case, in order to ensure that the claw 19d and the slit 7f match, it is convenient to assemble it if a guide groove for the insertion piece 19b is provided in the outer wall of the button frame 7. Finally, if the presser spring 20 is attached from the outside of the leaf spring 19, the assembly is completed.

As explained above, according to the present invention, there is no need to install stud bolts in the mounting plate, so manufacturing of the mounting plate becomes extremely simple. Furthermore, since the structure uses springs to fix the button frame and the button frame is integrated, there is no need for tightening work with bolts and nuts, making assembly extremely simple.

In addition, the button frame is inserted into the frame hole of the mounting plate from the front side, and there are stoppers around the entire circumference of the button frame that engage with the front edge of the frame hole, so these stoppers can be used to adjust the outline of the frame hole. As a result, the finishing of the frame hole does not need to be very high, and from this point of view as well, manufacturing of the mounting plate becomes easier. Further, since a push button retaining protrusion that covers the outer periphery of the push button is provided on the portion of the mounting plate of the button frame that protrudes from the front side, damage to the light-transmissive push button can be prevented. Furthermore,
A pawl and an insertion piece are integrally formed on the leaf spring, and the pawl penetrates a slit in the button frame and projects into the button frame, and the insertion piece is inserted between the inner surface of the frame hole and the outer surface of the button frame. Since the leaf spring was attached, it is extremely easy to install and remove the leaf spring, and its mounting structure is also extremely simple.Moreover, since this mounting claw is also used as a retaining piece for the shade, its configuration is also simple. . Furthermore, since the outside of the leaf spring is held by a presser spring, the leaf spring does not loosen and come off due to vibrations, etc., and can be mounted more stably.

[Brief explanation of the drawing]

Figure 1 is a front view of an elevator floor indication panel, and Figure 2 shows a conventional push button device.
3 is a front view of the push button device, FIG. 4 is a sectional view of the push button device according to an embodiment of the present invention, and FIG. 5 is a button frame, a leaf spring, and the like in the push button device. Rear view showing the assembled state of the presser spring, Figure 6,
7 and 8 are perspective views of a button frame, a leaf spring, and a presser spring, respectively, used in the push button device. 1...Mounting plate, 2...Push button, 5...Push button device,
7... Button frame, 7d... Stopper, 7e... Retaining protrusion, 7f... Slit, 8... Frame hole, 13
... Shade, 16 ... Lamp, 19 ... Leaf spring, 19a ... Spring action part, 19b ... Insert piece, 19c ... Spring receiving piece, 19d ... Claw, 20
...presser spring.

Claims (1)

[Scope of utility model registration request] A push button in which a button frame that guides a light-transmissive push button in a pressing direction is attached to a frame hole of a mounting plate, and a shade of a lamp that illuminates the push button from the back side is arranged on the back side of the push button within the button frame. In the device, a portion of the button frame that protrudes to the front side of the mounting plate includes a portion that protrudes outward from the frame hole, engages with the front edge of the frame hole, and covers the entire circumference of the front edge of the frame hole. A stopper for covering the frame hole and a protruding piece that protrudes inwardly from the frame hole to cover the outer periphery of the push button and prevent the push button from coming off; is provided with at least two leaf springs that engage with the outer wall of the button frame, and whose spring action portions abut against the back side of the mounting plate to urge the button frame to be drawn into the back side of the mounting plate,
Further, a slit is formed in a portion of the button frame that protrudes from the back side of the mounting plate, and a pawl that penetrates the slit and protrudes into the button frame is formed in the leaf spring, so that the shade is The leaf spring is configured so as not to slip out from the button frame, and an insertion piece is formed on the leaf spring to be inserted between the inner surface of the frame hole and the outer surface of the button frame. A push button device comprising a presser spring biased to attach the spring to the outer wall of the button frame.