JP2606991Y2 - Switch device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a switch device used for detecting, for example, a shift operation state of a transmission, a brake operation state, and the like in a vehicle, and variably adjusts a detection stroke thereof to enhance its versatility. Thus, the present invention relates to a novel switch device.

[0002]

2. Description of the Related Art A switch device conventionally used for detecting a brake, detecting a reverse gear and the like of a vehicle is disclosed in Japanese Utility Model Publication No. 4-22492.

[0003]

However, in this type of switch device, the displacement of the detected portion differs between when detecting the shift state of the transmission and when detecting the operation state of the brake, for example. It is necessary to change the detection stroke depending on the place of use,
In the related art, a plurality of switch devices are prepared corresponding to different displacement amounts of the detection target, and this is dealt with.

[0004] The present invention has been made in view of such circumstances, and the detection stroke can be easily changed and adjusted.
It is an object of the present invention to provide a novel switch device which can increase the versatility so as to correspond to the detected parts having different displacement amounts and can solve the above-mentioned problems.

[0005]

According to the invention, a fixed contact, a movable contact, and a switch spring for pressing the movable contact to a fixed contact are usually provided on the casing. Forming a switch chamber with a normally closed switch provided therein, and an operating member inserted from the outside into the switch chamber so as to be able to advance and retreat, and the operating member is displaced beyond a predetermined stroke from a standby position . Nire
And moving, in the switch device so as to opening operation of the switch, said the actuating member, it is the standby
Than the predetermined stroke to the movable contact when in the position
A switch operation unit facing at a large opposing interval ,
A rod portion extending from the switch operation portion along the direction of displacement of the operation member and having a tip portion slidably fitted into a guide hole of the casing is formed. The rod portion includes the switch operation portion and a movable contact. The actuating member is located between opposing surfaces of
Is in the standby position, the predetermined strike is
Fitted detachably annular stroke adjusting member having a clearance corresponding to the stroke, the stroke adjustment unit
When the operating member is in the standby position, the material
The switch spring receives the set load due to the presence of
And the operating member moves from the standby position to the predetermined stroke.
When the actuator is displaced by more than
The movable contact is separated from the fixed contact via the member
It is characterized by being pushed .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional side view of the switch device of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG.
It is a perspective view of a member for stroke adjustment.

In the case 1 of the switch device of the present invention, the front half of a bottomed cylindrical base member 3 made of an insulating hard synthetic resin is inserted and fitted into a large-diameter base of a metal case body 2. , Which are integrally connected to each other.
A switch chamber C surrounded by the inner peripheral surface of the base member 3 is defined inside the sing 1, and a switch S described later is provided in the switch switch chamber C.

[0009] The case body 2, the base 2 ₁ a base 2 ₁ a large diameter forming an outer peripheral surface in a polygonal shape, are inscribed in the male screw on the outer peripheral portion is protruded integrally forward from the center portion
More configured with tip portion 2 ₂ of smaller diameter than, its previously part 2 ₂ front guide hole 4 is bored, the inner end of the front guide hole 4 is opened in the switch chamber C, and whose Outer end is tip 2
₂ is communicated with the opening 5 at the tip. Wherein the guide hole 4 front rod portion 6 ₁ of synthetic resin push rod 6 is fitted slidably. The rear end of the push rod 6 protrudes into the switch chamber C, and the front end thereof faces the opening 5. Wherein the opening 5, steel balls 7 are supported so as to be retractable, and front rod portion 6 ₁ tip is engaged in the push rod 6 on the inner surface of the steel balls 7, advancement of the push rod 6 According to the sliding, the steel ball 7 is pushed and protrudes from the opening 5, and when the steel ball 7 is pushed inward, the push rod 6 is slid backward.

A push disk 8 made of synthetic resin is accommodated in the switch chamber C so as to be movable in its axial direction.
The push disk 8 and the disk portion ₈₁ as clearly shown in FIG. 3, stepped shaft portion 8 of the back surface of the disc portion _81
2 and a rear rod portion 8 ₃ integrally extending rearward in the axial direction from the center of the stepped shaft portion 8 _2. A switch S described later is turned off at the base of the rear rod portion 8 _3. the switching section 8 ₄ is formed. Also on the back of the disc portion ₈₁ is formed a spring seat surface 9 of the coil spring 15 to be described later, consisting of ribs projecting from the plurality of radially further outer periphery of the large diameter portion of the stepped shaft section 8 ₂ The spring guide 10 of the coil spring 15 is formed integrally. The outer peripheral portion of the disc portion ₈₁ is fitted movably to the inner circumferential surface of the base member 3, also a rear portion of the bottomed the rear rod section 8 ₃ bored in the rear end wall 3 ₁ of the base member 3 It is slidably fitted in the guide hole 11. At the center of the disk portion ₈₁ of the push disk 8, is open toward the front, fitting hole 12 of the bottom are drilled and a small-diameter portion 12 ₁ and the large-diameter portion 12 _2, the the rear end of the push rod 6 to the small diameter portion 12 ₁ of the fitting hole 12 is inserted tightly fitting. The push disk 8 and the push rod 6 are integrally movable in the axial direction .
An actuating member A that operates a switch S described later by displacing beyond a predetermined stroke from the standby position shown in FIG.
Is composed.

[0011] disk portion 8 of the switch chamber in a C, the base 2 ₁ of the inner end wall of the case body 2 and the push disk 8
_A disc-shaped sealing member 13 that seals the switch chamber C from the outside in a liquid-tight manner is provided between them. The sealing member 13 is a soft synthetic resin material, is formed by a flexible material such as rubber, cylindrical clamped portion 13 ₁ is formed integrally with the central portion, also of which, each of the outer peripheral portion ball-edged ampulla 13 ₂ thick, 13 ₃ are formed integrally. The cylindrical clamped portion 13 ₁ of the sealing member 13, the inner end of the push rod 6 are through, the clamped portion 13 ₁ of the large-diameter portion 12 ₂ of the fitting hole 12 It is tightly clamped by an annular seal clamping portion 14 formed between the peripheral surface and the outer peripheral surface of the push rod 6 with an appropriate tightening margin. The outer periphery of the sealing member 13 is
It is densely sandwiched and fixed between the inner edge of the base portion 2 ₁ of the inner end wall and the base member 3.

A compression coil spring 15 is provided between a spring support 24 formed on the inner peripheral surface of the base member 3 of the casing _{1 and} the spring seat surface 9 formed on the back surface of the disk portion 81.
The coil spring 15 is engaged with the spring guide 10 composed of a plurality of ribs, and is guided by the spring guide 10 so as to be smoothly and securely extended and contracted in the axial direction. . The resilient force of the coil spring 15 moves the operating member A composed of the push disk 8 and the push rod 6.
The steel ball 7 protrudes from the opening 5 by urging forward to a standby position, which is a predetermined advance limit . A pair of fixed contacts 16 is provided at a rear portion in the switch chamber C in a circumferential direction of approximately 180 °.
° the disposed with a phase difference, their bases fixed contact 16 is inserted through the rear end wall 3 ₁ of the base member 3, their outer ends being supported, the recess formed in the rear end of the base member 3 17
The inside is connected to a lead wire 18 by soldering 19, and the recess 17 is filled with a filler 20 such as an epoxy resin to cover and fix the connection portion 19.

[0013] disk-shaped movable contact 21 so as to face the bending inner ends of the pair of fixed contacts 16 is disposed, and a back surface of the movable contact 21, a coil spring between the rear end wall 3 ₁ inner surface of the base member 3 A switch spring 22 is contracted, and the resilience of the switch spring 22 is reduced as shown in FIG.
Is normally urged to contact the fixed contact 16.
The fixed contact 16, the movable contact 21, and the switch spring 22 constitute the switch S.

[0014] The actuating member of the intermediate portion or push the disc 8 of A, the switching operation portion 8 formed in the boundary portion between the rear rod section 8 base i.e. rear rod section 8 _{3 3} and stepped shaft portion _{82 4} faces the movable contact 21 at an interval
Especially when the operating member A is in the standby position.
Opposing distance T between the switch operation unit 8 ₄ and the movable contact 21, before
It is larger than the predetermined stroke. And this switch action
On work unit _{8. 4,} detects the stroke adjustment member i.e. collar 23 removably fitted plugged into the rear rod section 8 ₃ are seated, the collar 23, the actuating member A the standby position
Pairs of the switching section 8 ₄ and the movable contact 21 when in the location
With a play t corresponding to the predetermined stroke between the facing surfaces
I have. That is, at this time, the upper surface of the collar 23 faces the movable contact 21 through the play t, and the operating member A is pushed by the detection object via the steel ball 7 to thereby move the predetermined contact.
When retracted or stroke, the switching section 8 ₄ can OFF operation of the movable contact 21 pushed up, switch S via a collar 23. And the collar 23
Is exchanged with another collar having a different thickness , so that the play t, and hence the displacement stroke of the operating member A when the switch S is switched ( ie, the detection stroke that the switch device receives from the object to be detected). ) Can be variably adjusted.

Next, the operation of this embodiment will be described.

When the switch S is in the free state as shown in FIG. 1, the movable contact 21 is urged toward the fixed contact 16 by receiving the resilient force of the switch spring 22, and the movable contact 21 is turned on.
16 contacts and the switch is in the ON state.

In this ON state, when the steel ball 7 receives an external force from the object to be detected, the steel ball 7 moves inward against the resilient force of the coil spring 15, and the push rod 6 engaged with the steel ball 7 is engaged. The operating member A including the push disk 8 and the push disk 8 is displaced backward in the switch chamber C. Thus actuating member A is moved away from the fixed contact 16 is moved backward the movable contact 2 1 against the elastic force of the switch spring 22 via the collar 23, so that the switch S is turned OFF. When the external force acting on the steel ball 7 from the object to be detected is released, the resilient force of the coil spring 15 advances the operating member A including the push rod 6 and the push disk 8 until the steel ball 7 reaches the projecting position. Let it. As a result, the movable contact 21 comes into contact with the fixed contact 16 by the elastic force of the switch spring 22, and the switch S returns to the ON state again.

Since the displacement stroke of the operating member A when the switch S is switched is set by the thickness of the collar 23, the displacement stroke of the operating member A is changed by replacing the collar 23. For example, when this switch device is used to detect a shift operation state of a transmission or an operation state of its foot brake of a vehicle, even if there is a difference in a detected stroke amount from an object to be detected, the thickness is different. Only by replacing the collar 23, it is possible to cope with the detection of both states.

The operating member A has a front rod 6
₁ and a rear rod portion 8 ₃ are slidably fitted in both ends supported by the front guide hole 4 and the rear guide holes 11, respectively, it said switch switching section 8 ₄ S is provided in the middle portion Therefore, every time the switching operation of the operating member A is performed, the operating member A is guided by the front and rear guide holes 4 and 11 and slides back and forth accurately, and even if the switching operation is frequently repeated, the operating member A "falls down". And high-precision switching operation can be always guaranteed without generating any "shaking".

Further, the seal member 13 includes an operating member A
Reciprocating back and forth following the forward and backward movements of the push rod 6 which constitutes a liquid-tight seal between the switch chamber C and the outside, thereby preventing external transmission oil or the like from entering the switch chamber C. Acts to be.

Although one embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various embodiments are possible within the scope of the present invention. In the above-described embodiment, as an example, the case where this switch device is used for detecting a shift operation state of a transmission in a vehicle or an operation state of a foot brake thereof has been described. However, the switch device is operated in response to a displacement stroke from an object to be detected. Of course, it can be implemented as a general switch device. Further, in the above-described embodiment, the operating member is formed by connecting the push rod and the push disk. However, the operating member may be formed integrally, or may be formed by connecting three or more members. Further, as the adjusting member for adjusting the displacement stroke of the operating member, another equivalent object may be used instead of the collar.

[0022]

As described above, according to the first aspect of the present invention, the casing is provided with a fixed contact, a movable contact, and a switch spring for normally bringing the movable contact into pressure contact with the fixed contact. Forming a switch chamber with a built-in type switch, providing an actuating member inserted into the switch chamber from the outside so as to be able to advance and retreat , and interlocking with the actuating member being displaced beyond a predetermined stroke from a standby position , In the switch device configured to open a switch, the operating member has an opposing interval larger than the predetermined stroke at the movable contact when the operating member is at the standby position.
And a rod portion extending in the direction of displacement of the operating member from the switch operating portion and having a tip portion slidably fitted into a guide hole of the casing, the operating member is Even if the switching operation is repeated frequently, the displacement posture is stabilized by the sliding guide action of the guide hole with respect to the rod portion, and it is possible to avoid the "falling down" and the "runout" and to guarantee the high precision switching operation. it can.

In addition , an operating member is provided on the rod portion between the opposing surfaces of the switch operating portion and the movable contact.
When in the standby position, the predetermined stroke
Because fitted detachably annular stroke adjustment unit <br/> material having a play corresponding to, in the rod portion, the thickness
The play, and hence the detected stroke amount can be easily changed simply by selectively replacing and fitting different stroke adjusting members, so that various switch devices having different detected stroke amounts can be obtained at low cost. , And the versatility of the device is greatly improved. In changing the stroke, the rod itself can be used as an attachment / detachment means for the stroke adjusting member, so that the operation is extremely simple.

Furthermore the stroke adjusting member, the actuation unit
When the material is in the standby position (switch on)
Do not receive the set load of the switch spring due to the play.
Fried, switch spring set load also at the front and rear replacement of the adjusting member, and by extension does not change the operation feeling of the switch, thus always constant operational feeling regardless of any changes of the stroke is obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of the switch device of the present invention.

FIG. 2 is an exploded perspective view thereof.

3 is a perspective view of the actuating member and a stroke adjusting member

[Explanation of symbols]

1 ..... Ke - Thing 8 ₃ ... rod section (rear rod portion) 8 ₄ ... switching section 11 .... guide hole (posterior guide hole) 16 ... fixed contact 21 ... movable contact 22 ... switch spring 23 .... stroke adjusting member (collar) A · · · · · actuating member C · · · · · switch chamber S · · · · · switch T ..... opposing distance t ..... play

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 13/14 H01H 13/18

Claims (1)

(57) [Scope of request for utility model registration] 1. A fixed contact (16) is provided on a casing (1).
A switch chamber (C) equipped with a normally closed switch (S) including a movable contact (21) and a switch spring (22) for normally pressing the movable contact (21) against a fixed contact (16).
And an actuating member (A) inserted into the switch chamber (C) from the outside is provided so as to be able to advance and retreat , and is interlocked with displacement of the actuating member (A) beyond a predetermined stroke from a standby position. Te, the switch device so as to opening operation of the switch (S), wherein the actuating member (a), when it is in said standby position
Larger than the predetermined stroke the movable contact (21) to
A switch operating portion (8 ₄ ) facing at an interval (T), and a length extending from the switch operating portion (8 ₄ ) along the direction of displacement of the operating member (A), and a tip portion of the casing (1). the guide hole (11) in the rod portion to be inserted slidably (8 ₃₎ and is formed, on its rod portion (8 _3), the switching section (8 ₄₎ and moving contact (21) Between the opposing surfaces of the
When the operating member (A) is at the standby position,
With a play (t) corresponding to the predetermined stroke.
Fitted ring-shaped stroke adjustment member (23) removably, the stroke adjustment member (23), said actuating member
When (A) is in the standby position, the play (t) is
Receives the set load of the switch spring (22).
The operating member (A) moves from the standby position to the predetermined position.
When it is displaced by a stroke or more, the switch operation unit (8
₄ ) is a movable contact (21) via the adjusting member (23).
To the side separated from the fixed contact (16).
A switch device, characterized in that: