JPH0734340B2 - Seesaw switch device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seesaw switch device in which a single switch is opened and closed by a seesaw operation of a key button, in particular, a communication device such as a multi-function telephone and a radio device. The present invention relates to an improved structure of a spring function for holding a key button in a balanced and restorable manner in a seesaw switch device used for.

2. Description of the Related Art FIG. 3 and FIG. 4 show schematic configurations of conventional seesaw switch devices of this type.

That is, in one of the seesaw switch devices according to the conventional example shown in FIG. 4, dust for balancing and restoring the key button 1 is provided between the lower ends of both ends of the key button position and the set of single switches 2, 2. An elastic member such as the seat 3 is interposed, and the key button 1 is fitted into the opening of the outer case 5 from the back surface side so that the flange portion 4 abuts, and each pressing operation surface is moved to the front surface side to the seesaw. It is configured to be elastically expressed in a form, and each of the individual switches is operated by the seesaw operation accompanying the pressing operation from the front side of the key button 1.
2 and 2 can be opened and closed separately,
FIG. 3 shows a state in which the key button 1 is operated by applying a pressing force indicated by an arrow a to close the single unit switch 2 on the relevant portion side.

Further, in the other seesaw switch device according to the conventional example shown in FIG. 4, in the configuration of the previous example, the key button 1 is pivotally supported by the fulcrum shaft 6 so that the seesaw can operate, and similarly, the individual unit switches 2 and 2 are separately provided. It is designed such that it can be opened and closed. In this case, as shown in FIG. 4, the key switch 1 is operated by applying the pressing force indicated by the arrow a to operate the unit switch 2 on the relevant side.
Is in a closed state.

However, in the conventional seesaw switch device configured as described above, in order to hold the key button 1 in a seesaw type in a balanced and recoverable manner, a rubber sheet 3 or a leaf spring is separately provided. In addition to the relatively expensive elastic body member and the complicated auxiliary structure, the material and manufacturing cost increase, and the structure is often complicated, which is disadvantageous. There is a substantially unfavorable problem such as the need to use an assembly facility such as a jig for maintaining the equilibrium posture.

SUMMARY OF THE INVENTION The present invention is intended to solve such a conventional problem, does not require an elastic member as a separate member for equilibrium and reversible holding of a key button in a seesaw operation type, and An object of the present invention is to provide a seesaw switch device of this type, which does not need to use an assembling facility such as a jig for maintaining the posture even during assembly.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a seesaw switch device in which a seesaw operation of a key button pivotally supported by an exterior main body is used to open and close a single switch. With respect to the button, at least a part of an intermediate portion of an elastically flexible elastic member is integrally formed so as to be orthogonal to the axial direction of the seesaw operation, and both end portions of the elastic elastic member are formed. The key button is fixed to the exterior body side so that the key button can be held in an equilibrium posture.

Therefore, according to the present invention, with the above-described configuration, the integrated elastic piece member is bent and the closing operation of the single switch is caused by the seesaw operation by the pressing operation of the key button held in the equilibrium posture. By releasing the pressing force, the repulsive force of the bent elastic piece member closes the unit switch, and the equilibrium posture before the key button is actuated can be restored.

Embodiment An embodiment of the seesaw switch device according to the present invention will be described in detail below with reference to FIGS. 1 and 2.

FIG. 1 is an exploded perspective view schematically showing an outline of a seesaw switch device to which this embodiment is applied, and FIGS. 2 (a) and 2 (b) are equilibrium states of key buttons of the same device (single switch). FIG. 3 is a perspective view showing an open state of FIG. 1) and a seesaw operating state (closed state of a single switch).

That is, in the configuration of the apparatus of the embodiment shown in FIG.
Is a key button in which the pressing surfaces 12 and 12 are arranged at the left and right positions on the front surface side of the main body, and a notch portion 13 for pivotal support in the central position on the back surface is formed in the axial direction of the seesaw operation.
On one side surface of the key button 11, at least a part of an intermediate portion of a so-called leaf spring-like elastic piece member 14 having elasticity and flexibility, in this case, the left and right portions close to the cutout portion 13 are provided. Each part is integrally formed in a direction orthogonal to the axial direction of the seesaw operation through the connecting arm parts 15 and 15, respectively, and the extended end parts of the elastic piece member 14 are crossed. Support arm portions 16 and 16 having a required axial length in a U-shape facing down are provided, and each of these portions is, for example,
It is preferable to integrally mold with a resin material capable of exhibiting the corresponding elastic characteristics.

Further, 21 and 21 are a set of single switches, which are disposed on the lower side corresponding to the left and right pressing surfaces 12 and 12 of the key button 11, for example, on the printed circuit board 22.

Further, 31 denotes an intermediate case body, and each hook portion for fixedly fitting and locking the support arm portions 16 at both ends of the elastic piece member 14 to regulate the arrangement position of the key button 11. 32,32,
A fulcrum protrusion 33 that pivotally supports one side of the cutout 13 on the seesaw.
And have respectively. Reference numeral 34 denotes the case body, which has engaging portions 35, 35 that receive one end of each of the support arm portions 16, 16 and fixedly hold it. Reference numeral 36 denotes a rear case body, which has a fulcrum shaft portion 37 that pivotally supports the other side of the cutout portion 13 on the seesaw.

Then, assembling the above-mentioned parts, first, the intermediate case body
With the support arms 16 and 16 of the elastic piece member 14 fitted and locked to the hooks 32 and 32 of the reference numeral 31, one side of the notch 13 is pivotally supported by the fulcrum protrusion 33. Then, one end of each support arm portion 16, 16 is connected to each engagement portion 3 of the front case body 34.
After being engaged and held by 5,35, by interposing the printed circuit board 22, the set of each single switch 21,21 is positionally controlled corresponding to the left and right pressing surfaces 12,12 of the key button 11, and further, these By sandwiching between the rear case body 36, the hook portions 32, 32 having the fulcrum shaft portion 37 for pivotally supporting the other side of the notch portion 13 by the fulcrum shaft portion 37, and the notch portion 13
One side of the seesaw is pivoted.

Therefore, in the case of the seesaw switch device of the present embodiment configured as described above, when not operating, the elastic force applied to the elastic piece member 14 causes the key button 11 to move to the cutout portion 13.
Is maintained in an equilibrium state by the fulcrum protrusion 33 and the seesaw pivotal support at the fulcrum shaft portion 37 (see FIG. 2 (a)). For this reason, both of the individual switches 21, 21 are kept in the open state. To be done.

In addition, in the equilibrium state, when one pressing surface 12 of the key button 11 is pressed as shown by an arrow a (see FIG. 2 (b)), the key button 11 is cut into the cutout portion.
Around the seesaw pivotal fulcrum of the fulcrum protrusion 33 and the fulcrum shaft 37 with respect to 13, against the elastic force of the elastic piece member 14, the arrow b
Seesaw operation as seen in Fig.
The elastic switch can be closed by closing the corresponding single switch 21 in the state of being stored, and by releasing the applied pressing force, the elastic piece is repulsed by the elastic force accumulated. The member 14 can be restored to the equilibrium state again, and the single switch 21 can be opened.

That is, as described above, in the seesaw switch device according to this embodiment, a desired seesaw operation can be realized by the spring action of the elastic piece member 14 integrated with the key button 11. Since there is no need for an elastic body part for balancing and restoring such as a separately formed rubber sheet, even when the device is assembled for this reason,
It is not necessary to use a jig or other assembly equipment for maintaining the posture.

In the above embodiment, the elastic piece members are integrally formed on only one side of the key button, but it is also possible to form the elastic piece members on both sides. Thus, the elastic piece members are integrally formed on both sides of the key button. When the key button is formed, the spring action of the elastic piece member with respect to the key button can be further stabilized, and a smooth operation can be performed.

EFFECTS OF THE INVENTION As is apparent from the description of the above-described embodiment, the present invention causes the integrated elastic piece member to bend and close the single switch with the seesaw operation by the pressing operation of the key button held in the equilibrium posture. It is possible, and by releasing the applied pressing force, it is possible to close the single switch by the repulsive force of the bent elastic piece member and restore the key button to the equilibrium posture before the operation. In contrast, by utilizing the spring action of the elastic piece member integrally formed with the key button, the required seesaw operation can be realized, and there is no need for an elastic and restoring elastic member such as a rubber sheet. For this reason, the device structure itself can be extremely simplified, and the material and manufacturing cost can be significantly reduced.
Even when the device is assembled, it does not require assembly equipment such as a jig for maintaining the posture, and has excellent features such as easy assembly work.

Further, according to the present invention, the supporting arm portions at both ends of the elastic piece member are fixedly held, and the notch portion for pivotal support in the axial direction of the seesaw operation is provided as the fulcrum protrusion of the intermediate case body and the rear case body. Since the seesaw is pivotally supported by the fulcrum shaft part and the fulcrum shaft of the seesaw is fixed, there is an advantage that no displacement occurs even if the seesaw operation is repeated.

[Brief description of drawings]

FIG. 1 is an exploded perspective view schematically showing an outline of an entire equipment including a seesaw switch device to which an embodiment of the present invention is applied, and FIGS. 2 (a) and 2 (b) are balance of key buttons in the same device. FIG. 3 is a perspective view showing a state (corresponding to an open state of a single switch) and a seesaw operating state (corresponding to a closed state of a single switch), and FIGS. 3 and 4 are seesaws according to conventional examples. It is a structure explanatory view showing the outline of a switch device typically in an operational state. 11 ... Key button, 12,12 ... Pressing surface, 13 ... Notched part, 14 ... Elastic piece member, 15,15 ... Connecting arm part, 16,16 ... Support arm part, 21,21 ... Single switch, 22 ... Printed circuit board , 31 ... intermediate case body, 32, 32 ... hook portion, 33 ... fulcrum projection portion, 34 ... front case body, 35, 35 ... engaging portion, 36 ... rear case body, 37 ... fulcrum shaft portion.

Claims (1)

[Claims] 1. A seesaw switch device in which a single switch is opened and closed by a seesaw operation of a key button pivotally supported on an exterior main body. A seesaw operation shaft formed at an intermediate position on the back side of the key button. A notch portion that serves as a pivotal support in the direction, an elastic piece member integrally forming at least a part of an intermediate portion of the key button orthogonal to the axial direction of the seesaw operation, and both end portions of the elastic piece member. A support arm portion formed on the base, an intermediate case body having a fulcrum protrusion for fixedly fitting and locking the support arm portion to pivotally support one side of the cutout portion on the seesaw, and the other of the cutout portions. A seesaw switch device having a rear case body having a fulcrum shaft portion for pivotally supporting the seesaw side.