JPH0528657Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to an operation switch in which an operation part is fixed to an operation panel and a switch housing is attached to this operation part via a lock part, and in particular, This invention relates to a lock mechanism for fixing a lock part.

(b) Prior art In an operation switch configured by separating the operation section and the switch section consisting of a lock section and a switch storage section, the operation section is fixed to the operation panel, and then the operation section is fixed to the mounting section formed on the operation section. Secure the switch storage section via the lock section. As shown in FIG. 8, the structure of this lock part is that an engagement recess 7 is formed on the outer circumference of a mounting part 72 that is formed protrudingly on the back surface of the operating part 71.
2b are formed at two locations, upper and lower, and a fitting hole 74b is formed in the lock portion 74, and the mounting portion 72 is fitted into the fitting hole 74b. An engaging claw 74a is formed on the inner peripheral surface of the fitting hole 74b at a position facing the engaging recess 72b, and when the mounting portion 72 is fitted into the fitting hole 74b, the engaging claw 74a is elastically deformed up and down. and engages with the engagement recess 72b. The attachment portion 72 is fixed to the lock portion 74 by the engagement between the engagement claw 74a and the engagement recess 72b.

(c) Problems to be solved by the invention However, with the conventional operation switch mentioned above,
The mounting portion 72 may be held by the lock portion 74 even when the engagement claw 74a is not securely engaged with the engagement recess 72b, and in such a state, the operation portion 71
Even if the pressing surface 71a is pressed, the switch 75 fixed to the lock portion 74 does not operate, and the main device to which the operating switch is attached cannot perform the desired operation. If such a poor attachment between the operating section and the lock section occurs in an emergency switch such as a stop switch, it is a problem as it may cause accidents such as failure or damage to the device. In addition, it is not possible to easily check after installation whether the engaging claw and the engaging recess are securely engaged, and when a large number of switches are installed on the operation panel, checking the installation status is complicated. Currently, it is not possible to reliably prevent the occurrence of installation defects.

The purpose of this invention is to be able to securely fix the mounting part of the operating part in the lock part, and to make it easy to check the attachment part, and to prevent the occurrence of poor attachment between the switch and the operating part, and to prevent malfunction or damage to the device. An object of the present invention is to provide a locking mechanism for an operation switch that can reliably prevent accidents such as the above.

(d) Means for Solving the Problems The locking mechanism of the operating switch of this invention includes an operating part having a substantially cylindrical mounting part formed on the back surface, a locking part that fits onto the mounting part of the operating part, and a locking part. and a switch case configured with a switch storage section continuous to the back of the operation switch, and the switch case is attached by fitting a lock part onto a mounting part of the operation part fixed to the operation panel, the operation part being attached to the switch case. The mounting portion has a longitudinal groove in the thrust direction open to the end face and a lateral groove in the radial direction communicating with the longitudinal groove at one or more positions on the outer circumferential surface, and the lock portion rotates an annular lock plate. and an annular fixing plate is coaxially fixed to the lock plate, and the lock plate has a lever on its outer circumferential surface and a first lever on its inner circumferential surface that engages with the vertical groove and the horizontal groove. the first protrusion is rotatably held by the lock portion between a position where it engages with the vertical groove and a position where it engages with the horizontal groove, and the fixing plate has an inner circumferential surface. a second protrusion that engages only in the vertical groove; a protrusion and a hole in the center and circumferential surface of the side surface facing the lever; It is characterized in that it is fixed to the lock part.

(e) Function In this device, the first protrusion of the lock plate, which is rotatable in the lock part, can be engaged with the vertical groove and the horizontal groove formed in the mounting part of the operation part. After attaching the mounting part of the operation part to the lock part with the lock plate engaged with the vertical groove, when the lever is operated and the lock plate is rotated, the first
The protrusion engages with the lateral groove, and movement of the lock portion of the mounting portion of the operation portion in the thrust direction is restricted.
Even in this state, the first protrusion of the fixing plate maintains its engaged state with the longitudinal groove, and the movement of the mounting portion of the operating portion in both the radial direction and the thrust direction is restricted by the lock portion. Further, a convex portion is formed in the center of the side surface of the fixed plate that is in contact with and fixed to the lock plate in the range facing the lever, and a hole is formed in the corresponding peripheral surface. The rotational movement of the lever is restricted by contact with this convex part, but the side surface on which the convex part is formed has an elastic force in the axial direction due to the hole, and when an external force is applied to the lever, the lever protrudes due to the elastic force of the side surface. When the part retreats to the extraction hole side and the lever passes over the convex part, it is restored to its original state by the elastic force of the side surface. Therefore,
The rotation of the lever is restricted at either the position where the first protrusion of the lock plate engages with the vertical groove or the position where it engages with the horizontal groove, and depending on the rotation angle of the lever, the first protrusion of the lock plate engages with the longitudinal groove. It can be recognized whether it is in a state in which it is engaged with the lateral groove and can move in the thrust direction, or in a state in which it is engaged with the lateral groove and movement is restricted in both the radial direction and the thrust direction.

(f) Embodiment FIG. 1 is an assembly diagram of an operation switch which is an embodiment of this invention.

The operation switch 1 is an illuminated pushbutton switch, and is composed of an operation section 2 and a switch case 7. The operating section 2 includes a lens 3 on the front surface and a cylindrical mounting section 4 on the back surface. A mounting screw portion 4c is formed on the outer circumferential surface of the mounting portion 4, leaving only a portion. This mounting screw part 4
After externally fitting the stop plate 5 onto c, the fixing nut 6 is screwed on, and an operation panel (not shown) is held between the back surface of the operation section 2 and the stop plate 5. This allows the operation section 2 to be fixed to the operation panel. A vertical groove 4 in the thrust direction that is open at the end is formed on the outer circumferential surface of the mounting portion 4 in a portion where the mounting screw portion 4c is not formed.
a and a radial horizontal groove 4b communicating therewith.
is formed. These vertical grooves 4a and horizontal grooves 4b
are provided at two locations on the outer peripheral surface of the mounting portion 4, as will be described later. Further, a key groove, which will be described later, is formed on the outer circumferential surface of the mounting portion 4.

The switch case 7 is composed of a storage section 7a for storing the switch holder 11 and a lock section 7b formed on the front surface of the storage section 7a. The storage section 7a is a hollow casing with open front and back surfaces, and the lock section 7b has a hollow cylindrical shape with a short axis. The switch holder 11 is fitted into the storage section 7a from the back side. A lock plate 17 is attached to the lock portion 7b.
is rotatable within a predetermined range in the directions of arrows A and B. There are two protrusions 1 on the inner peripheral surface of the lock plate 17, which are the first protrusions of this invention.
7a is formed, and a lever 17b is formed on the outer peripheral surface.
is formed. Further, a fixing plate 18 is fitted onto the front end surface of the lock portion 7b. This fixing plate 18 restricts the axial movement of the lock plate 17 in the lock portion 7b. The fixing plate 18 has two parts on its inner peripheral surface.
A protrusion 18a is formed, and
A key 18b is formed at one location.

The switch holder 11, which is housed in the housing section 7a of the switch case 7, is made of an insulating material and has a substantially cubic shape, and houses a switch (not shown) inside. A cylindrical terminal block 12 is formed to protrude from the front surface of the switch holder 11, and a lead terminal 15 is wound around the outer peripheral surface of the terminal block 12. Convex portions 15a are formed at two locations on the outer peripheral surface of the pull-out terminal 15, and an end portion 15b extending toward the front surface of the switch case 11 is held between the ends of the terminal 14. Furthermore, one end of the terminal 13 is located at the bottom of a hole 12a formed in the center of the terminal block 12. Furthermore, a knocker 11a is provided at the lower part of the front surface of the switch holder 11 so as to be slidable in the directions of arrows C and D. This movement of the knob 11a causes the movable contact of the switch housed in the switch holder 11 to operate. In addition, the lock 11 is the operation switch 1.
By pressing the lens 3 after assembling the arrow C
move in the direction.

A spring 10, which is a cylindrical coil spring made of a conductive material, is fitted into a hole 12a provided in the terminal block 12. One end of this spring 10 contacts one end of the aforementioned terminal 13 inside the hole 12a. Further, a lamp holder 8 formed into a substantially cylindrical shape and made of a conductive material is fitted onto the terminal block 12 .
A lamp 9 is inserted into this lamp holder 8 from the back side. A flange portion 9a is formed on the side surface of the bottom of the lamp 9, while a step portion 8a is formed at the middle portion of the lamp holder 8. As shown in FIG. 7, the movement of the lamp 9 in the insertion direction inside the lamp holder 8 is restricted by the contact between the collar portion 9a and the stepped portion 8a. Two L-shaped grooves 8b are formed on the circumferential surface of the lamp holder 8, one end of which is open to the rear end. The convex portion 15a of the pull-out terminal 15 fits into and engages with the groove portion 8b. At this time, the other end of the spring 10 contacts the bottom of the lamp 9, and the electrode at the bottom of the lamp 9 is electrically connected to the terminal 13 via the spring 10. On the other hand, the side surface of the lamp 9 has contact between the flange 9a and the step 8a and the groove 8b.
The engagement with the convex portion 15a establishes conduction with the terminal 14. Since the lamp 9 is urged in the insertion direction within the lamp holder 8 by the elastic force of the spring 10, the state of contact between the flange portion 9a and the step portion 8a is reliably maintained.

FIGS. 2A and 2B are a side view and a rear view, respectively, showing a main part of a mounting part formed on an operating part that constitutes a part of the operating switch.

A vertical groove 4a and a horizontal groove 4b are formed on the outer circumferential surface of the attachment part 4 at two points symmetrical about the central axis thereof. The vertical groove 4a is open at the rear end of the mounting portion 4, and the horizontal groove 4b communicates with a part of the vertical groove 4a. Furthermore, a keyway 4d is formed at one location on the outer circumferential surface of the mounting portion 4. This keyway 4
d is a groove in the thrust direction that is open on the back surface of the mounting portion 4.

FIGS. 3A and 3B are a plan view and a front view, respectively, of a fixing plate fitted into a lock portion of a switch case constituting a part of the operating switch.

The fixing plate 18 is formed into a substantially ring shape by resin molding, and has two protrusions 18a on its inner peripheral surface.
A key 18b is formed at one location. Also,
The outer peripheral surface has a radius enlarged in a part, and a convex portion 1 is formed on the side surface on the back side of the enlarged radius part.
8c is formed. Further, a punch hole 18d is provided on the circumferential surface of this portion.

FIG. 4 is a front view of a lock plate provided in a lock portion of a switch case that constitutes a part of the operating switch.

The lock plate 17 has a substantially ring shape formed by press working from a flat metal plate, and has two inner circumferential surfaces.
Protrusions 17a are formed at two points symmetrical to each other with respect to the central axis. Further, a lever 17b is provided on the outer peripheral surface.

When the fixing plate 18 and lock plate 17 configured as described above are attached to the lock part 7b, the protrusion 17a of the lock plate 17 and the protrusion 18a of the fixing plate 18 are located on one side as shown in FIG. Match. Further, the positions of the protrusion 17a and the vertical groove 4a coincide when the back surface of the mounting portion 4 and the front surface of the lock portion 7b are opposed to each other. Further, at this time, the positions of the key groove 4d and the key 18b are similarly aligned. The outer diameter of the mounting portion 4 is formed to have a predetermined fit size with respect to the inner diameters of the fixing plate 18 and the lock plate 17, and the mounting portion 4 fits inside the fixing plate 18 and the lock plate 17.

As shown in FIG. 5, the lever 17b has a convex portion 18c.
When the protrusion 17a is located above the vertical groove 4, the protrusion 17a
Matches position a. Further, the radial width of the protrusion 17a matches the radial width of the vertical groove 4a. Therefore, when the attachment part 4 is fitted inside the lock plate 17 and the fixing plate 18 with the lever 17b positioned above the protrusion 18c, the protrusion 17
a, 18a engages with the vertical groove 4a. Further, at this time, the key 18b engages with the keyway 4d. Mounting part 4
When the mounting part 4 is inserted to the position where the back surface of the lock part 7b comes into contact with the inner surface of the lock part 7b, the protrusion 1 is inserted in the axial direction.
7a corresponds to the position of the horizontal groove 4b. The width of the protrusion 17a matches the width of the lateral groove 4b, and when the lever 17b is moved in the direction of arrow A from the state shown in FIG. 5, the protrusion 17a engages with the lateral groove 4b.

As described above, when the lever 17b is moved in the direction of arrow A after the attachment part 4 is fitted into the lock part 7b, the movement of the attachment part 4 in the thrust direction is restricted by the engagement between the protrusion 17a and the lateral groove 4b. Also,
Movement of the mounting portion 4 in the radial direction is restricted by the engagement between the protrusion 18 and the longitudinal groove 4a and the engagement between the key 18b and the keyway 4d. As a result, the mounting portion 4 is securely fixed at the lock portion 7b.

FIGS. 6A to 6C are plan views showing the operation of the main parts of the lock portion of the switch case that constitutes a part of the operation switch.

In the state shown in FIG. 5 in which the protrusion 17a of the lock plate 17 faces the longitudinal groove 4a as shown in FIG.
Located above 8c. At this time, lever 17b
movement in the direction of arrow A is restricted by contact with the convex portion 18c. When the lever 17b is operated in the direction of the arrow A from this state, the convex portion 18c is pressed in the direction of the arrow E by the lever 17b as shown in FIG. evacuate. At this time, the convex portion 18
An elastic force in the direction of arrow F is generated on the side surface forming c. From this state, the lever 17b is further moved in the direction of arrow A, and when the lever 17b is located below the convex part 18c in FIG.
No external force acts on 8c in the direction of arrow E, and the elastic force in the direction of arrow F generated on the side surface of fixing plate 18 where convex portion 18c is formed returns it to its original state. As a result, the convex portion 18c comes into contact with the lower side of the lever 17b as shown in FIG. 6c, and the lever 1
7b is restricted from moving in the direction of arrow B. In this way, by forming the protrusion 18c on the fixed plate 18, the movement of the lever 17b is restricted, and the protrusion 1
It is possible to maintain either a state in which 7a engages with the vertical groove 4a or a state in which it engages with the horizontal groove 4b. In addition, by providing the hole 18d, elastic force is generated on the side surface on which the convex portion 18c is formed, giving a notched feel to the operation of the lever 17b, making it easier to confirm the installation state during the installation work. . Furthermore, by checking the inclination state of the lever 17b from the back of the operation panel after the installation work is completed, it is possible to easily recognize the fixed state of the mounting part 4 in the lock part 7b, and the lock part 7b and the mounting part 4 can be easily recognized. The installation condition can be ensured.
Furthermore, the magnitude of the elastic force generated on the side surface on which the convex portion 18c is formed can be adjusted by the width and shape of the hole 18d.

As described above, according to this embodiment, the vertical groove 4
a, horizontal groove 4b and key groove 4d and protrusions 17a, 1
8a and the key 18b, the lock part 7
The attachment part 4 can be securely fixed to b. At this time, the convex portion 18 formed on the fixed plate 18
c and the hole 18d, the lever 17b can be held in either the position where the protrusion 17a faces the vertical groove 4a or the horizontal groove 4b, and the fixing state of the mounting part 4 in the lock part 7b can be easily maintained. can be recognized.

Although this embodiment has been described with reference to an illuminated pushbutton switch, the present invention can be implemented in the same manner with other operation switches that are divided into an operation section and a switch section.

(g) Effect of the invention According to this invention, the radial movement of the lock portion of the mounting portion of the operating part is restricted by the engagement between the second projection of the fixing plate and the vertical groove, and the thrust movement of the lock portion of the mounting portion of the operating part is restricted by the engagement between the first projection of the lock plate and the horizontal groove. The lock plate makes it easy to check the installation during the installation work by the notch feeling caused by the contact between the lever and the convex part, and since the rotation is restricted when the first projection of the lock plate is engaged with either the vertical groove or the horizontal groove, the engagement state of the first projection of the lock plate and the horizontal groove can be reliably maintained, and after the installation work is completed, it can be recognized whether the lock plate is engaged with the vertical groove or the horizontal groove based on the rotation angle of the lever, making it easy to check the installation state of the operating switch.

[Brief explanation of the drawing]

Figure 1 is an assembly diagram of an operating switch equipped with a locking mechanism, which is an embodiment of this invention, and Figures 2A and B.
are a side view and a rear view, respectively, showing the main parts of the mounting part of the operation part that constitutes a part of the operation switch;
Figures 3A and 3B are a plan view and a front view, respectively, of a fixing plate attached to the lock part of a switch case that constitutes a part of the operation switch, and Figure 4 is a view of the switch case that constitutes a part of the operation switch. FIG. 5 is a front view of the lock plate rotatably provided in the lock section, FIG. 5 is a front view of the lock section of the switch case that constitutes a part of the operating switch, and FIGS. FIG. 7 is a plan view showing the function of the locking portion of the switch case, and a side sectional view of the main part of the operating switch. Further, FIG. 8 is an assembly diagram showing a locking mechanism of a conventional operating switch. 1... Operation switch, 2... Operation section, 4... Mounting section, 7... Switch case, 7a... Storage section,
7b...Lock part, 17...Lock plate, 1
7a...Protrusion, 17b...Lever, 18...Fixing plate, 18a, 18b...Protrusion.

Claims (1)

[Claims for Utility Model Registration] Consisting of an operating part with a substantially cylindrical mounting part formed on the back, a lock part that fits onto the mounting part of the operating part, and a switch storage part continuous to the back of the lock part. and a switch case, in which the switch case is attached by fitting a lock part onto the mounting part of the operating part fixed to the operation panel, the mounting part of the operating part being one or more on the outer circumferential surface. A vertical groove in the thrust direction opened at the end face and a lateral groove in the radial direction communicating with the vertical groove are provided at the position of the lock part, and the lock part rotatably holds the annular lock plate and also holds the annular fixing plate in the position of the lock part. The lock plate is fixed coaxially to a lock plate, and the lock plate has a lever on an outer circumferential surface and a first protrusion that engages with the vertical groove and the horizontal groove on the inner circumferential surface, and the first protrusion The fixing plate is rotatably held in the lock portion between a position where it engages with the vertical groove and a position where it engages with the horizontal groove, and the fixing plate has a second plate on its inner peripheral surface that engages only with the vertical groove. It is characterized in that it is provided with a protrusion, and is provided with a convex part and a hole in the center and the circumferential surface of the side face of the range facing the lever, and is fixed to the lock part by contacting the side face of the lock plate. Lock mechanism of operation switch.