JPH05311927A - Plane handle - Google Patents

Abstract

PURPOSE:To machine the components of a plane handle accurately under the state proper to mass production, and to reduce cost by improving a locking mechanism in the plane handle capable of releasing the state of the locking of the handle by pushing the handle into a case. CONSTITUTION:A locking mechanism is constituted of a locking spring 9 vertically moved by the swing of a handle 4, a guide projection 11 integrally formed on the internal bottom wall of a case 2 and a control projection 13. The state of locking and the state of the release of locking are changed over on a plane. Accordingly, both projections 11, 13 are formed on the plane, thus easily forming both projections 11, 13 accurately without depending upon special machining method and casting method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat handle used as an operating handle for an opening / closing door of a distribution board, a switchboard, etc., and particularly to a lock releasing operation for popping the handle out of the case. The target is a flat handle that is operated by pushing the case inward.

[0002]

2. Description of the Related Art A flat handle of this type is known, for example, from Japanese Patent Publication No. 2-41635. There, a lock mechanism provided between the operating lever and the case holds the handle in a non-use posture, and when the handle is pushed into the case, the lock mechanism is unlocked and the handle is pushed out of the case. be able to. From this state, when the handle is pushed into the case against the spring, the handle is locked again in the standby holding state.

There are several embodiments of the lock mechanism described above. One of them is a cam groove formed by utilizing the peripheral surface of the base end boss portion of the handle, and the handle is engaged with the cam groove to secure the handle. The handle is locked by a control pin that holds the non-use posture and the pop-out posture and a leaf spring that urges the control pin toward the cam groove. In another embodiment, the cam groove is formed in the lock boss that reciprocally rotates in conjunction with the handle. The cam groove is formed in an inverted heart shape and has stepped portions at four positions on the bottom of the groove for preventing reverse circulation of the control pin. The control pin locks the handle in two inverted V-shaped bends.

[0004]

As described above, the cam groove formed on the circumferential surface of the boss portion is difficult to process whether it is cut or cast, and the cost is high if it is accurately formed. Attach. At the expense of accuracy, the handle cannot be flush with the outer surface of the case in the standby state. For example, the appearance of the handle such as the tip of the handle protruding outside the case or sinking inside the case is impaired. The fact that four stepped portions must be provided at the groove bottom makes machining of the cam groove even more difficult.

In many cases, the flat handle uses the handle's pop-out action to release the engagement of the latch. However, in the configuration in which the base end boss of the handle is used to form the lock mechanism, the lock mechanism is an obstacle. Therefore, there is a disadvantage that the handle cannot be provided with the interlocking structure with the latch. Further, in the form in which the front end side of the handle is engaged with the lock mechanism, it is necessary to separately provide components such as the lock boss, the biasing spring and the pin for the lock boss, and the structure of the flat handle is complicated as a whole and the manufacturing cost is high. Attach.

It is an object of the present invention to obtain a flat handle whose constituent members can be accurately formed at a low cost in a working form suitable for mass production by improving a locking mechanism.

[0007]

A flat handle according to the present invention includes a case 2 and a handle 4 whose one end is pivotally supported by the case 2 and is urged to swing outward by a spring 5.
The lock mechanism is provided between the handle 4 and the case 2, and the lock mechanism is used as the base arm 6 of the handle 4.
Of the lock spring 9, which is reciprocally moved in conjunction with the swinging of the handle 4, a guide protrusion 11 which circulates and guides the claw portion 10 at the tip of the reciprocating movement of the lock spring 9 in one direction, and the guide protrusion 11. Lock groove 1 provided at the end on the base arm 6 side
2 and a regulation protrusion 13 that guides the claw portion 10 toward the lock groove 12, and the guide protrusion 11 and the regulation protrusion 13 are provided integrally with the case 2. .. Specifically, the guide projection 11 and the restriction projection 13 are integrally formed on the inner bottom wall of the case 2, the lock spring 9 is formed of a leaf spring, and the lock spring 9 is formed at one end of the spring 5 for the handle 4 by the case 2. The inner bottom wall is pressed and urged.

[0008]

As described above, the guide protrusion 11 is provided on the case 2 side.
By adopting a form in which the lock spring 9 that is reciprocally operated by these is provided and the guide protrusion 11 and the limit protrusion 13 are provided on the plane, only the guide protrusion 11 and the limit protrusion 13 are provided.
Compared to the case where a cam groove is formed on the circumferential surface, both protrusions 11 ・
13 can be easily and accurately processed, and die cutting can be easily performed.

[0009]

According to the present invention, the swinging motion of the handle 4 is converted into the reciprocating motion of the lock spring 9, which is circulated and guided by the guide projection 11 and the restriction projection 13 provided on the plane, and the handle 4 waits. The lock can be held in the state. That is, since the locked state and the unlocked state of the lock mechanism are switched on a flat surface, the guide projection 11 and the restriction projection 13 can be accurately formed in a working form suitable for mass production, and the handle 4 can be operated. Thus, the flat handle which is unlocked can be manufactured at low cost while preventing the appearance of the handle from being damaged due to incorrect position of the handle 4.

[0010]

【Example】

(Embodiment 1) FIGS. 1 to 7 show Embodiment 1 of a flat handle according to the present invention. 1 and 2, the plane handle is a die-cast case 2 that opens toward the outer surface of the door 1, a handle 4 that is swingably supported by a shaft 3 on the case 2, and the handle 4 is outside the case. It is composed of a spring 5 for urging and urging the handle 4, a latch 7 that is switched and operated by a base end arm 6 of the handle 4, and a lock mechanism that locks and holds the handle 4 in a standby state.

The lock mechanism includes a lock spring 9 made of a leaf spring that reciprocates up and down in conjunction with the handle 4, and a guide protrusion 11 that circulates and guides the claw portion 10 at the lower end of the lock spring 9.
A lock groove 12 provided at the upper end of the guide protrusion 11 and a regulation protrusion 13 for moving and guiding the claw portion 10 to the lock groove 12.
Etc. As shown in FIG. 3, the lock spring 9 is inserted into a groove 14 provided in the base end arm 6 of the handle 4 and is connected by a pin 15 which inserts both 9 and 6. The hole for the pin 15 on the proximal arm 6 side is formed as an elongated hole (see FIG. 2).

In FIG. 4, the guide protrusion 11 is composed of an inverted triangular block, and has a concave arc-shaped first guide surface 16 and
It has a second guide portion 17 having a convex arc shape continuous to this, and angular pieces 19 and 20 are continuously provided at the upper ends of both guide surfaces 16 and 17, and the recess between the angular pieces 19 and 20 is formed into the lock groove 12. I am trying. As shown in FIG. 3, when the spring center line P of the lock spring 9 in the free state is used as a reference, both guide surfaces 1
The lower end portions of 6 and 17 are arranged so as to intersect the spring center line P, that is, most of the guide projections 11 are arranged so as to be offset from the spring center line P to one side.

A linear rib-shaped restricting protrusion 13 is provided above the center of the lock groove 12 in the left-right width direction. Control projection 13
The interval between the lower edge of the claw and the groove bottom of the lock groove 12 is set to be larger than the vertical dimension of the claw portion 10. The claw portion 10 is the regulation protrusion 13
This is for allowing an overflow path between the lock groove 12 and the lock groove 12 to pass therethrough. The restriction protrusion 13 and the guide protrusion 11 are formed integrally with the case 2.

As shown in FIG. 7, the spring 5 for biasing the handle 4 to spring out is a torsion coil spring in which the left and right coil portions 22 and the working arm portion 23 provided between the coil portions 22 are integrally bent. The lock spring 9 is pressed against the bottom wall of the case by utilizing the latch arm 24 extending downward from the one coil portion 22. Specifically, the tip of the latching arm 24 is raised and further bent laterally to provide a pressing portion 25, which is latched to the lock spring 9.

Next, the operation of the lock mechanism will be described. Figure 5
As shown in (a), when the handle 4 is in the standby state, the claw portion 10 contacts the groove bottom of the lock groove 12 and prevents the handle 4 from being springed out by the spring 5. At this time, since the claw portion 10 is located at a position displaced from the spring center line P, the lock spring 9 is flexibly deformed as shown by an imaginary line.

From the above state, when the handle 4 is pushed into the case 2 as shown in FIG. 5 (b), the lock spring 9 moves upward in conjunction with the swing of the base end arm 6 thereof, and the claw portion is moved. 10 gets over the square piece 19 and slips out of the lock groove 12. At the same time, the lock spring 9 returns to the free state, and its claw portion 10 is positioned on the spring center line P. That is, the lock is released.

When the pushing force of the handle 4 is released, the handle 4 is pushed out of the case by the biasing force of the spring 5. On the other hand, as shown in FIG. 6A, the claw portion 10 moves downward in conjunction with the swing of the handle 4, but there is
Since the guide surface 16 is located, the claw portion 10 moves laterally while descending along the first guide surface 16 and gets over the lower end thereof. With the handle 4 fully extended,
The claw portion 10 returns to above the spring center line P again. In this state, the latch 7 comes off the door frame, and the door 1 can be opened.

After the door 1 is closed, the handle 4 is pushed into the case 2 as shown in FIG.
Is guided by the second guide surface 17 and moves upward to move the square piece 20.
Trying to get over and return to the spring center line P side. In order to receive the claw portion 10 in this state and guide the movement into the lock groove 12, a restriction protrusion 13 is provided. When the pushing force of the handle 4 which has been pushed in to the maximum is released, the handle 4 tries to swing toward the outside of the case again by the spring 5. However, when the handle 4 swings, as shown in FIG. 5A, the claw 10 is guided by the restricting projection 13 and moves downward only to enter the lock groove 12. Then, it again comes into contact with the square piece 19 and also with the groove bottom.

According to the above lock mechanism, the guide protrusion 1
Since the first projection 1 and the restriction projection 13 are provided on the inner bottom wall of the case 2, both projections 11 and 13 can be accurately formed by a die-cast casting method suitable for mass production and by a simple mold. Since it is formed integrally with the case 2, both protrusions 11 and 13
There is no increase in cost due to the provision of.

(Embodiment 2) FIG. 8 shows a flat handle according to Embodiment 2 of the present invention in which the lock spring 9 and the restricting protrusion 13 are modified. In this case, the lock spring 9 is formed of a wire spring, and the coil portion 9a of the lock spring 9 is inserted into the groove 14 of the base end arm 6 from below and connected by the pin 15. The claw portion 10 of the lock spring 9 is only as large as the wire diameter. Therefore, the regulation protrusion 1
3 is provided close to the guide protrusion 11 to prevent the claw portion 10 from passing between both protrusions 11 and 13.

(Embodiment 3) FIG. 9 and FIG. 10 show a flat handle in which most of the members are formed by press products of stainless plate materials. This is the case 2 and the makeup cover 2
7 and the case body 28, and the handle support 29, which is the only die-cast product, for forming the cover 2.
7 and the case body 28 are integrated by spot welding, and the set bolt 30 is fixed between the two 27 and 28.
The handle support 29 includes a pair of brackets 31 that pivotally support the handle 4, the guide protrusions 11, and the regulation protrusions 1.
3 and a boss 34 for attaching a latch (not shown) are integrally formed.

The handle 4 is formed by a handle plate 32 and an arm plate 33 welded and fixed to the inner surface of the handle plate 32.
A lock spring 9 made of a wire is connected to 3. The handle 4 is
It is supported on the case body 28 by the shaft 3 together with the bracket 31 of the handle support 29. By this assembly, the handle support 29 can be integrally fixed to the case main body 28 so as not to move.

In addition to the above, a shielding plate may be provided in the case 2 in order to prevent the lock mechanism from being visible when the handle 4 is pushed out of the case. The lock mechanism may be provided on the outer surface side of the bottom wall of the case 2. In this case, the bottom wall of the case 2 is formed deep at the tip end side of the handle 4 and shallow at the base end side to form a storage space for the lock mechanism. Can be secured.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a flat handle.

FIG. 2 is a vertical sectional side view showing a state where a handle is pushed into a case.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a perspective view of a main part of a lock mechanism.

FIG. 5 is an explanatory diagram of the operation of the lock mechanism, and FIG.
Shows a standby state, and FIG. 5B shows a process of unlocking the handle.

FIG. 6 is an operation explanatory view of the lock mechanism, and FIG.
Shows the process of the handle bouncing, and FIG. 6 (b) shows the process of returning the handle to the locked state.

7 is a sectional view taken along line BB in FIG.

FIG. 8 is a vertical cross-sectional front view of the flat handle according to the second embodiment.

FIG. 9 is a vertical sectional side view of a flat handle according to a third embodiment.

10 is a cross-sectional view taken along the line CC in FIG.

[Explanation of symbols]

 2 Case 4 Handle 5 Spring 6 Base Arm 9 Lock Spring 10 Claw 11 Guide Protrusion 12 Lock Groove 13 Control Protrusion

Claims (2)

[Claims] 1. A case 2 is provided between the handle 4 and the case 2, and a handle 4 whose one end is axially supported by the case 2 and is urged to swing outward by a spring 5. A flat handle including a lock mechanism, wherein the lock mechanism is connected to a base end arm 6 of the handle 4 and reciprocates in conjunction with the swing of the handle 4, and a lock spring reciprocates. A guide protrusion 11 for circulating and guiding the claw portion 10 at the tip of the guide rod 9 in one direction;
1 is a lock groove 12 provided at the end of the base end arm 6 side, and a restriction protrusion 1 for guiding the claw portion 10 toward the lock groove 12.
A flat handle that is configured to include 3 and in which the guide protrusion 11 and the regulation protrusion 13 are integrally provided with the case 2. 2. A guide projection 11 and a restriction projection 13 are integrally formed on an inner bottom wall of the case 2, a lock spring 9 is formed of a leaf spring, and a lock spring is provided at one end of a spring 5 for a handle 4. The flat handle according to claim 1, wherein the inner bottom wall of the case 2 is pressed and biased by the member 9.