JP4377713B2 - Compound operation switch - Google Patents

Description

  The present invention relates to a composite operation switch having an operation portion that is movable both angularly and linearly.

JP 2001-257108 A

  Patent Document 1 discloses a composite operation switch capable of operating a rotary electrical component and operating a pull switch that turns off a contact point by pressing a single operation shaft.

  In this composite operation switch, the operation shaft is held in a shaft hole of the bearing member so as to be rotatable and to be pressed in the axial direction. A rotating body that rotates integrally with the operating shaft and is provided with a conductor pattern made of a conductive material such as a metal plate is attached to the operating shaft. An insulating substrate having a plurality of slider pieces on the upper surface is provided on the lower side of the rotating body, and the rotating body rotates together by rotating the operation shaft. A pulse signal is generated by sliding on the slider piece. The rotation number or rotation angle of the operation shaft can be detected by this pulse signal.

  In addition, two first and second fixed contacts for the pull switch are provided on the lower surface of the insulating substrate. Below the two fixed contacts, a holding member having a movable contact is attached to the tip of the operating shaft, and is biased outward by a coil spring. In the state before the operation, the movable contact contacts the first and second fixed contacts by the urging force of the coil spring, and the two fixed contacts are in a conductive state. When the operating shaft is pressed inward of the switch, the movable contact moves downward together with the holding member against the biasing force of the coil spring, and the movable contact is detached from the first and second fixed contacts. The conduction between the two fixed contacts is released.

  However, in the composite operation switch of Patent Document 1, the operation shaft is held only in the shaft hole of the bearing member, and the operation shaft is unstable. Moreover, since the holding member and the movable contact of Patent Document 1 are formed to be considerably larger than the size of the operation shaft in the radial direction, there is a problem that the rear end side of the switch is enlarged. The present invention has been made in view of the above-described problems, and provides a composite operation switch in which a switch operation can be reliably performed and a switch device can be reduced in size without a backlash of an operation shaft. Objective.

In order to solve the above problem, the present invention provides an operation shaft having a contact plate interlocking with the rotation direction and a movable contact interlocking with the axial direction, and the upper end side of the operation shaft can be rotated and moved in the axial direction. fixed contacts and a bearing cover for holding, the conduction between the contacts by moving said movable contact by pressing operation of the conductive pattern switch operation the operating shaft by the contact plate by the rotation operation of the operation shaft is opened And a terminal base integrally provided with the terminal base, the terminal base holding the operation shaft , a holding hole having the fixed contact is provided, and the fixed contact in communication with the holding hole is drilled up, the guide portion for guiding the movable contact is moved in the axial direction of the operating shaft is provided, to pass through the holding hole It said movable contact attached to the lower end side of the operation shaft, and as the movable contact is disposed in the guide portion movably.

Further, the fixed contacts are opposed to each other so as not to contact each other, and are provided in the holding holes in a state where the contact surfaces face each other, the movable contacts enter between the two fixed contacts, and left and right inclined surfaces respectively You may form in the substantially mountain shape which protruded upwards so that the said fixed contact may be contacted .

  Furthermore, a terminal portion provided integrally with each of the conductor pattern and the fixed contact protrudes downward in the axial direction of the operation shaft, and is configured with the terminal in a case that houses each member together with the bearing cover. A connector portion may be provided.

Since the operation shaft is held by the bearing cover and the terminal base, the operation shaft can be held without rattling. Thus, even if the movable contact is directly attached to the operation shaft, the contact position between the movable contact and the fixed contact does not vary, and contact failure does not occur. Thus, since the movable contact can be directly attached to the operation shaft, the number of parts can be reduced, and the switch can be downsized.
Moreover, since the guide part which guides the movement of a movable contact is provided, the play of a movable contact can be prevented and generation | occurrence | production of a contact failure can be suppressed.

Furthermore, since the movable contact contacts each of the two fixed contacts at two points, even if dust or the like is inserted into one contact point, the movable contact and the fixed contact are in conduction at the remaining three points. No problems such as poor contact occur.

  Since the movable contact is directly attached to the operation shaft, a large space around the movable contact can be obtained, the degree of freedom of the rotation of the terminal can be increased, and the terminal can be protruded in the operation axis direction. If the connector portion is formed by the terminal and the case, the switch can be easily connected. In addition, since the connector portion is provided integrally with the case, a separate connector is not required, and the manufacturing cost can be reduced.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a composite operation switch according to an embodiment of the present invention.

  The composite operation switch according to the present embodiment includes an operation shaft 1, a rotor 2, and a terminal base 3, and these components are housed in a housing 6 including a bearing cover 4 and a case 5.

  The operation shaft 1 has an operation knob (not shown) attached to the upper end portion 1a and is operated by a user to be switched. The operation shaft 1 can be rotated by a cylindrical bearing portion 41 formed on the bearing cover 4 and in the axial direction. It is held movable. A disc-shaped body portion 10 is formed at the center of the operation shaft 1, and a steel ball 16 is directed toward the outside of the body portion 10 by an action spring 17 in a hole 11 formed in a side surface of the body portion 10. Stored in an energized state. On the inner peripheral surface of the bearing cover 4, a protrusion 42 against which the steel ball 16 abuts and a wave-like portion (not shown) extend in the circumferential direction, and when the operation shaft 1 is operated in the axial direction, the steel ball When 16 passes over the protrusion 42, a click feeling is obtained and the operation shaft 1 is held at the upper position and the lower position. On the other hand, when the operation shaft 1 is rotated, the steel ball 16 gets over each convex portion of the wave-like portion, so that a click feeling is obtained and the operation shaft 1 can be held at a predetermined rotation position. . A connecting portion 12 is provided on the lower surface of the body portion 10 so as to protrude downward. Further, a first step portion 13 and a second step portion 14 are formed on the lower end side of the operation shaft 1, and a movable contact 18 is attached to the lower end of the operation shaft 1.

  As shown in FIG. 2, the movable contact 18 is formed in a substantially rectangular plate shape by a conductive member, and an insertion hole 18 a through which the lower end having a circular cross section of the operation shaft 1 is inserted is provided at the center. At both ends on the long side of the movable contact 18, there are provided substantially mountain-shaped contact portions 18 b that are bent so as to protrude upward. In addition, two guide convex portions 18 c are provided so as to protrude sideways on the diagonal lines of the both side pieces of the movable contact 18. As shown in FIG. 1, the movable contact 18 is inserted into the rear end of the operation shaft 1 and attached to the second step portion 14 of the operation shaft 1 by the urging force of the return spring 19. .

  The rotor 2 is formed in a substantially disk shape and rotates integrally with the operation shaft 1. The connection portion 12 of the operation shaft 1 is inserted into a connection receiving hole 21 provided on the upper surface of the rotor 2 and engaged. To be connected. A substantially disc-shaped contact plate 22 is attached to the lower surface of the rotor 2. The contact plate 22 is urged downward by a spring 23. When the contact plate 22 rotates together with the rotor 2 and comes into contact with a plurality of conductor patterns 31 described later, a switch operation is performed according to the operation of the operation shaft 1.

  The terminal base 3 is made of an insulating material, and a plurality of conductor patterns 31 are provided on the upper surface of the terminal base 3 so that the contact plate 22 is brought into contact therewith for conduction. The conductor pattern 31 is insert-molded on the terminal base 3 and is disposed at a predetermined position substantially flush with the upper surface of the terminal base 3. Further, the upper end of the conductor pattern 31 is bent substantially vertically, and the terminal portion 36 at the lower end extends in the axial direction of the operation shaft 1 and extends into the connector portion 51 of the case 5 described later. On the other hand, a holding hole 32 through which the operation shaft 1 is inserted is provided at the center of the terminal base 3 and holds the operation shaft 1 so as to be rotatable and movable in the axial direction together with the bearing portion 41 of the bearing cover 4. ing. As described above, since the operation shaft 1 is held at two points, the operation shaft 1 can be arranged without rattling.

  Two fixed contacts 33 and 34 that are not in contact with each other are opposed to the lower end of the holding hole 32 so as to be integrally formed with the terminal base 3. As shown in FIG. 3, the two fixed contacts 33 and 34 are arranged in a state where the contact surfaces are formed in a substantially U shape and face each other. When the movable contact 18 comes into contact with the fixed contacts 33 and 34, the two contact portions 18b of the movable contact 18 enter the gaps 38 between the two fixed contacts 33 and 34, respectively, and the left and right slopes of the contact portion 18b. Are in contact with the fixed contacts 33 and 34, respectively. That is, since the movable contact 18 comes into contact with the fixed contacts 33 and 34 at two points, even if dust or the like is inserted at one contact point, the movable contact 18 and the fixed contact 33 at the remaining three points. Since 34 is conductive, problems such as poor contact do not occur. In addition, the contact location of the movable contact 18 and the fixed contacts 33 and 34 is not limited to this, and a plurality of locations may be contacted. The two fixed contacts 33, 34 are also formed so that the upper ends thereof are bent substantially perpendicularly like the conductor pattern 31 and the terminal portions 36 at the lower ends extend in the axial direction of the operation shaft 1.

  Under the two fixed contacts 33, 34, a guide portion 35 in which the cross section is substantially the same shape as the movable contact 18 and the movable contact 18 is guided in the axial direction of the operation shaft 1 is formed. . The guide portion 35 is provided in communication with the holding hole 32, and the lower end of the operation shaft 1 passes through, and the movable contact 18 attached to the lower end of the operation shaft 1 is movably disposed. Further, as shown in FIG. 3, the guide portion 35 is provided with two groove portions 35a into which the guide convex portion 18c of the movable contact 18 is inserted and guided.

  If the outer peripheral surface of the terminal base 3 is configured to be fitted into the opening 43 of the bearing cover 4, the operation shaft 1, the rotor 2, the contact plate 22, and other assemblies are assembled in the bearing cover 4 during the assembly process. After the necessary parts are assembled, the terminal base 3 can be used to cover the parts, so that the assembly is completed as one assembly and the parts do not fall off, so that the subsequent assembly can be facilitated.

  FIG. 3 is a bottom view of the terminal base 3. As shown in this figure, the conductor pattern 31 and each terminal portion 36 at the lower end of the terminal base 3 are located at the outer peripheral position of the guide portion 35 of the terminal base 3, that is, in this embodiment. In the form, seven terminal portions 36 in total, two on the outside of the long piece of the guide portion 35, one on the outside of the short piece of the guide portion 35, and one on the right side in FIG. ing. As described above, since the movable contact 18 is directly attached to the end of the operation shaft 1, a sufficient space for the terminal portion 36 to protrude outward can be provided.

  The case 5 has a substantially cylindrical shape with a bottom, and a cylindrical spring holding portion 50 that holds one end of the return spring 19 protrudes from the bottom surface of the case 5. A return spring 19 that biases the movable contact 18 is disposed between the bottom surface of the case 5 and the movable contact 18. As shown in FIGS. 1 and 4, a connector portion 51 for electrically connecting to an external connector is provided below the case 5. The connector portion 51 is provided with a substantially box-like connection portion 52 protruding, and seven holes 53 are formed on the bottom surface of the connector portion 51 so as to pass through the terminal portions 36 at positions corresponding to the terminal portions 36. Thus, the connector portion 51 integrated with the case 5 is formed. Thus, since the connector part 51 is formed integrally with the case 5, it is not necessary to provide another connector member, so that the number of components can be reduced and electrical connection can be performed with one touch.

  Next, the operation of the composite operation switch having the above configuration will be described. First, when the operation shaft 1 is at the lower position shown in FIG. 1, the movable contact 18 is located away from the fixed contacts 33 and 34 and is in a non-contact state. When the operating shaft 1 is rotated in this state, the rotor 2 and the contact plate 22 rotate together with the operating shaft 1, and the contact plate 22 selectively conducts the plurality of conductor patterns 31 of the terminal base 3, Switch operation is performed.

  On the other hand, when the operating shaft 1 is pulled, the operating shaft 1 moves to the front position, but the movable contact 18 also moves upward by the urging force of the return spring 19 and comes into contact with the two fixed contacts 33 and 34 and becomes conductive. To do. The operation shaft 1 can be rotated even when the operation shaft 1 is in the upper position, and the same rotary switch operation as described above can be performed.

  In the present embodiment, the conductor pattern 31 and the fixed contacts 33 and 34 are provided such that the upper end is bent substantially vertically and the lower end terminal portion 36 extends in the axial direction of the operation shaft 1. The terminal portion 36 may be further bent in the vertical direction, and the connector portion 51 may be provided in the lateral direction of the case 5.

  In addition, the movable contact 18 of the present embodiment is attached to the second step portion 14 of the operation shaft 1 by being urged by the urging force of the return spring 19, but is not limited thereto. The operation shaft 1 may be directly fixed by an adhesive or the like, and various modifications can be considered.

The longitudinal cross-sectional view of the composite operation switch concerning embodiment of this invention. (A) is a front view of the movable contact of FIG. 1, (b) is the top view. The bottom view of the terminal base of FIG. The bottom view of the case of FIG.

Explanation of symbols

  Operation shaft ... 1, terminal base ... 3, bearing cover ... 4, case ... 5, movable contact ... 18, conductor pattern ... 31, holding hole ... 32, fixed contact ... 33, 34, guide part ... 35, connector part ... 51 .

Claims (3)

An operation shaft having a contact plate interlocking with the rotation direction and a movable contact interlocking with the axial direction;
A bearing cover for holding the upper end side of the operation shaft so as to be rotatable and movable in the axial direction;
Conduction between the contacts by moving said movable contact by pressing operation of the conductive pattern switch operation the operating shaft is provided integrally with a fixed contact is opened by the contact plate by the rotation operation of the operating shaft In compound operation switch with terminal base,
Holding the operation shaft in the terminal base, providing a holding hole having the fixed contact ,
Providing a guide portion that communicates with the holding hole and is drilled to the fixed contact, and guides the movable contact to move in the axial direction of the operation shaft;
A composite operation switch, wherein the movable contact is attached to a lower end side of the operation shaft penetrating the holding hole, and the movable contact is movably disposed in the guide portion . The fixed contacts face each other so as not to contact each other, and are provided in the holding holes with contact surfaces facing each other. The movable contacts enter between the two fixed contacts, and left and right inclined surfaces are fixed. The composite operation switch according to claim 1, wherein the composite operation switch is formed in a substantially mountain shape protruding upward so as to contact the contact point .   A connector portion configured together with the terminal in a case for housing each member together with the bearing cover by projecting a terminal portion integrally provided on the conductor pattern and the fixed contact to the lower side in the axial direction of the operation shaft. The composite operation switch according to claim 1, wherein the composite operation switch is provided.

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