JP3463131B2 - switch - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch which is configured to perform a switching operation when a displacement operation exceeding a preset value is applied, the state thereof is locked, and which can be artificially reset.

[0002]

2. Description of the Related Art The above-mentioned switch is provided, for example, at an elevator ascending / descending limit position. When the amount of elevator movement exceeds a limit, the switch is detected and the safety circuit is activated, and the switch is locked. It is reset and used as a safety switch for various devices.

Conventionally, such a switch has been manufactured as a dedicated switch in which a lock and reset mechanism is incorporated and mounted in a switch body.

[0004]

In the conventional switch of this type, since the lock and reset mechanism as well as the switching mechanism is assembled in the case of the switch body,
It takes time to assemble the switch as a whole, and there was room for improvement in terms of assembly workability.

Further, since it is completed as a dedicated switch with a lock mechanism, it lacks versatility.

The present invention has been made in view of the above points, and an object thereof is to provide a switch with a lock mechanism which is excellent in assembling workability and has high versatility. is there.

[0007]

In order to achieve the above object, the present invention has the following constitution. That is, the invention according to claim 1 is, in a switch main body having a built-in switching mechanism, an operating portion for operating the switching mechanism, and a lock body for locking the operating portion in a resettable manner.
It is a switch equipped with a lock unit equipped with
The lock unit can be freely attached to and detached from the switch body.
In, and, together with Keru freely attached to the mounting direction, Le
The operation shaft equipped with a bar is inserted and mounted, and the rotation of the lever
The operating mechanism is moved up and down by the switching mechanism.
The head unit that operates the
It can be attached and detached freely and can be attached in any direction.
Characterized in that it comprises Te.

The invention according to claim 2 is the invention according to claim 1.
In addition to the structure described above, in the lock unit,
Attach the lock body to the boss protruding from the lock unit case.
Ride freely for internal fitting and lock case
A spring that biases the slide inward is fitted on the lock body,
Press the cap that receives and supports the outer end of the spring against the boss.
It is characterized in that it is fitted in and out so that it cannot be pulled out .

The invention according to claim 3 is the lock unit.
The lock body is equipped with a lock action part at the inner end.
Shaft, with a flange in the middle
Then, this lock body was projected on the case of the lock unit.
Insert it into the boss from the outside and slidably support it internally.
Lock the spring that urges the lock body to slide inside the case.
Is fitted to the outside and is supported by receiving the inner end on the flange.
Of the coil spring while supporting the lock body through it.
A cap that receives and supports the outer end is externally attached to the boss.
Then, press-fit and fit the cap to the outer surface of the boss and the cap.
It is characterized in that the projections formed on the inner circumferential surface of the cup are elastically engaged so that they cannot be pulled out.

[0010]

According to the structure of the invention according to claim 1, the switch body, the lock unit and the head unit which are separately assembled are assembled.
Completed switch with lock mechanism by connecting
However, you can select multiple types of head units prepared in advance.
By using, you can obtain switches with various operating modes.
Wear. In addition, the switch itself has an independent switch.
Since it has a function of H
In addition to being usable, the switch body and lock unit
Combined switch with lock mechanism or switch
With a switch that combines the switch body and head unit
It is also possible to use it. In addition, each unit
It can be To apply Yibin support the direction of Tsu door to use form.

According to the second aspect of the present invention, the lock
A spring and a cap for biasing the slide are externally attached to the body
The lock body while inserting the lock body into the boss of the case.
The cap can be press-fitted onto the boss in a snap-fit state.
With, the lock body can be attached to the case.

According to the third aspect of the present invention, the outer end of the lock body protruding from the cap is fitted to the outer end of the lock body with the spring for slide biasing and the cap fitted on the lock body.
Pre-assemble the parts around the lock body by connecting the
After that, the lock body can be
The lock body can be assembled into the case by inserting the cap into the boss and press-fitting the cap onto the boss in a snap-fit state.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall appearance of a lever-operated switch according to the present invention, FIG. 2 shows its disassembled state, and FIGS. 3 and 4 show its internal structure. .

This switch basically has a structure in which a switch body 1, a lock unit 2 and a head unit 3 are connected in series and fastened and fixed by a screw 4. The detailed structure of each part will be described below. Will be explained.

The switch main body 1 is a box-shaped main body case 6 having a front face opened and a cord lead-out hole 5 formed at the lower end, and a screw 7 is attached to the lower part of the front face so as to be swingable about a fulcrum X. Front covers 8 and 2 which are fixed in the closed state by
A switching mechanism 9 that can open and close the circuit of the line in a contradictory manner, and a plunger 1 that constitutes an operating portion for operating the switching mechanism.
0, and a rubber seal cap 11 that is fitted on the plunger 10 and the like, and is configured so that the front cover 8 can be opened to connect wiring to the terminals of the switching mechanism 9.

The switching mechanism 9 includes a movable body 12 connected to the lower end of the plunger 10, and a pair of movable terminals 15 and 16 elastically supported by the movable body 12 via springs 13 and 14 so as to be movable up and down. Two sets of fixed terminals 17a fixed to the main body case 6 so as to face the movable terminals 15 and 16
17b, 18a-18b, and. Then, in a normal state, as shown in FIG. 4, the movable body 12 is displaced upward by the return spring 19 and fixed terminals (normally closed terminals) 17a-17 are provided.
While the movable terminal 15 is in contact with b and is in the ON state,
The movable terminal 16 is separated from the fixed terminals (normally open terminals) 18a-18b and is in the off state.
When the movable body 12 is displaced downward by being pushed in, the movable terminal 15 is separated from the fixed terminals 17a-17b to switch to the OFF state, and the fixed terminals 18a-18b come into contact with the movable terminal 16 to turn on. It is designed to switch.

The lock unit 2 has a box-shaped case 21 opened downward and a plunger 22 as an operating portion penetratingly mounted from below, and a shaft-shaped lock body 23 slidably mounted inward and outward on a side surface of the case. The projection 21a protruding from the lower end of the case 21 is
The case 21 can be positioned and mounted on the switch body 10 by engaging with the recess 6a formed on the upper surface of the body case 6 in the switch body 1. In this positioning state, the case 21 can be mounted on the lower surface of the center of the plunger 22. The upper end of the first plunger 10 is adapted to be engaged.

A square flange portion 24 is provided at the lower end of the plunger 22, and a spring 25 is interposed between the flange portion 24 and the base portion of the seal cap 11 to be assembled to the switch body 1. Thus, the plunger 22 is biased and projected from the upper surface of the case 21, and the floating of the seal cap 11 is prevented.

A boss 26 is provided on the side surface of the case 21, a lock body 23 is slidably inserted into the boss 26 from the outside, and a cap 27 penetratingly supporting the lock body 23 is snap-fitted to the boss 26. It is fitted and fixed to the state. That is, as shown in FIG.
A pair of grooves 26a and protrusions 26b at diagonal positions on the outer peripheral surface of the
And a pair of protrusions 27a are formed at diagonal positions on the inner peripheral surface of the cap 27, the cap 27 is externally press-fitted into the boss 26, and the protrusion 27a is engaged with the groove 26a and the protrusion 26b. The elastic engagement allows the cap 27 to be fixed to the boss 26 in a non-rotatable manner.

The lock body 23 is formed in a shaft shape having a lock acting portion 23a at an inner end and a flange portion 23b at an intermediate portion, and a knob 28 for resetting operation is attached to an outer end thereof. It is fixed. Also, the spring 2
9 is interposed between the flange portion 23b and the cap 27, and the lock body 23 is urged to slide inward.

When assembling the lock body 23,
The lock body 23 fitted with the spring 29 is attached to the cap 27 in advance.
Through, and press-fit the knob 28 to the protruding outer end,
The lock body 23, the spring 29, the cap 27, and the knob 28 are preassembled, and then the cap 27 is press-fitted onto the boss 26 while the lock body 23 is inserted into the boss 26. Alternatively, the cap 27 is externally press-fitted into the boss 26 while inserting the lock body 23 to which the spring 29 is externally fitted into the boss 26, and then the knob 28 is press-fitted and fixed to the outer end of the lock body 23 protruding from the cap 27. .

The lock action portion 23a, which is the inner end of the lock body 23 assembled to the case 21, has the plunger 22.
In the normal state, as shown in FIG. 3, the lock action portion 23a abuts the outer end surface of the flange portion 24 and is displaced backwards against the spring 29. Then, when the plunger 22 is pushed and displaced until the switching operation is performed and the flange portion 24 is displaced downward to the set position or less, the lock action portion 23a faces the concave portion 24a formed on the upper surface of the flange portion. As shown in FIG. 7, the lock body 23, which is released from the contact with the outer end surface of the flange portion 24, is slid inward by the spring 29 and engaged with the recess 24 a, and thereafter, the pushing action on the plunger 22 is released. Even if the lock is applied, the locked state that prevents the upward return displacement is maintained.

In this locked state, the knob 28
When the lock action portion 23a is disengaged from the flange portion 24 by artificially pulling, the plunger 22 can be returned and displaced upward again, and a reset state is brought about.

In the head unit 3, a movable piece 32 as an operating portion is vertically movably fitted into a box-shaped head case 31 having a downward opening, and an operating shaft 34 having a lever 33 is attached to the side surface of the case. The recessed portion 2 formed by inserting and mounting the head case 31 on the upper surface of the case 21 in the lock unit 2
The head case 31 can be positioned and mounted on the lock unit 2 by engaging it with the lock unit 2 in the center lower surface of the movable piece 32.
Is fitted to the upper end of the plunger 22.

A cam portion 34a that is eccentric with respect to the operation shaft axis Q is formed in the insertion portion of the operation shaft 34 in the case, and the movable piece 32 is supported by contact with the lower surface of the cam portion 34a. In a normal state where the lever 33 is in the upright posture, the lower surface of the cam portion 34a is horizontal and the movable piece 32 is raised to the upper limit position. When the lever 33 is swung to the left or right from the upright posture, the cam portion 34a tilts around the axis Q to push down the movable piece 32 and displace it, and this moves through the plunger 22 of the lock unit 2 to the switch body. 1
The switching mechanism 9 is actuated by being transmitted to the plunger 10 and the lock body 23 is actuated as described above to hold (lock) the switch switching state.

The switch of the present invention configured as described above can be modified and used in the following forms.

As shown in FIG. 7, only the lock unit 2 is connected to the switch body 1 and the plunger 22 of the lock unit 2 is operated from the outside.

As shown in FIG. 8, only the head unit 3 is connected to the switch body 1, and the plunger 10 of the switch body 1 is operated by the movable piece 32.

Although not shown, only the switch body 1 is used alone as a limit switch or the like.

[0030]

As is apparent from the above description, the present invention has the following effects.

According to the first aspect of the present invention, the switch body and the lock unit can be separately assembled and later connected to each other, so that all the mechanical parts are assembled in the body case of the switch body. Compared to the conventional switch, the workability of assembly has been improved.
In addition, since you can connect any type of head unit,
So that it can be used in a form that is suitable for the usage and installation conditions
And has excellent applicability.

According to the invention of claim 2, the effect of the invention of claim 1 is brought about, and the lock unit is
Assembly of the lock body on the
It became possible to improve the sex.

According to the invention of claim 3, in addition to the effect of the invention of claim 1, pre-assembly around the lock body in the lock unit becomes possible, which is more effective in improving the assembly workability. .

[Brief description of drawings]

FIG. 1 is a perspective view of the entire appearance.

FIG. 2 is an exploded perspective view

FIG. 3 is a vertical sectional side view showing an internal structure.

FIG. 4 is a vertical sectional front view showing the internal structure.

FIG. 5 is an exploded sectional view around the lock body.

FIG. 6 is a cross-sectional view of a main part showing a locked state.

FIG. 7 is a side view showing another usage pattern.

FIG. 8 is a side view showing still another usage form.

[Explanation of symbols]

1 Switch body 2 Lock unit 3 head units 9 Switching mechanism 21 cases 23 Rock body 23a Lock action part 23b Flange part 26 Boss 26b protrusion 27 caps 27a protrusion 28 knobs 29 spring

Claims (3)

(57) [Claims] 1. A switch comprising a switch main body having a built-in switching mechanism, and a lock unit provided with an operating portion for operating the switching mechanism and a lock body for locking the operating portion in a resettable manner. , The lock unit can be attached to and detached from the switch body,
Also, the mounting direction can be freely set and the lever
The operation shaft equipped with the
The operating mechanism is moved up and down to create the switching mechanism.
Move the moving head unit to the lock unit.
And attach and detach freely, and attach in any direction.
Switch that. 2. The lock unit in the lock unit,
Slide the body into the boss protruding from the lock unit case.
It can be freely fitted inside and the lock body can be inserted inside the case.
Fit a spring that slides to the outside of the lock body.
Press the cap that receives and supports the outer end of the
The switch according to claim 1, wherein the switch is fitted and connected so as not to slip out . 3. A said lock unit, said lock
The locking body is provided at the inner end and
It is formed into a shaft shape with a flange part on the
From the outside into the boss protruding from the
Slidably inside to support the lock body inside the case
A spring that urges the slide is externally fitted to the lock body and the inner end is
The flange is received and supported, and the lock body is penetrated and supported.
And a key for receiving and supporting the outer end of the coil spring.
Attach the cap to the boss, and press the cap
Protrusion that is fitted and formed on the outer peripheral surface of the boss and the inner peripheral surface of the cap
2. The elastic engagement of the two is connected so as not to slip out.
The switch described.