JPH0334014Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a push button switch, and more particularly to a hand-type push button switch that allows switching of electrical equipment to be operated at hand via a cord.

BACKGROUND ART Conventionally, hand-type push button switches have been known as switches for electrical equipment (for example, nurse calls used in hospitals), which are not fixed to the equipment but are connected to the equipment by a cord and operated at hand.
As shown in Fig. 1, this switch has a cord 2 pulled out from a housing 1 in which a switch mechanism is provided.
This is used by connecting it to an electric device (not shown) through a connector 3 at the tip, and is operated by grasping the housing 1 with your hand and pressing a push button 4 provided at the top with your finger. For example, as shown in FIG. 2, the switch mechanism provided inside the casing 1 includes fixed contact pieces 5a and 5b to which the cord 2 is connected, and a movable contact piece 6.
are attached to the push button 4 and arranged facing each other, and the button 4 is pushed by the spring 8 interposed between the protrusion 7 of the housing 1 and the push button 4.
is biased upward. Switch is normally like this
It is in the OFF state. When the push button 4 is pressed, the movable contact piece 6 comes into contact with the fixed contact pieces 5a, 5b, and the switch is activated, that is, turned ON.

By the way, in this switch, the push button 4 protrudes from the housing 1 when it is in the OFF state. Therefore, when there is no intention to press button 4,
Sometimes you hit the button against something and press it by mistake. In addition, the housing 1 includes contact pieces 5a, 5b, and contact piece 6.
etc., and the housing 1b into which the cord 2 is introduced, the contact pieces 5a, 5
There is also the problem that maintenance of the contact parts of b and contact piece 6 is difficult (Utility Model Application No. 37140/1983,
Publication No. 37223).

The present invention was devised in view of the above-mentioned drawbacks of the conventional methods, and the push button, which is biased outwardly by a spring, is pushed against the switch mechanism housed in the housing, against the bias. In the hand type push button switch to be operated, the housing is made up of vertically divided housing pieces assembled together, and the inner wall of the housing has a first protrusion and a groove extending from the first protrusion in the pressing direction and in the circumferential direction. A second protrusion whose position has been changed together is provided, a protrusion is formed around the push button, and the push button is engaged with the first protrusion against the bias of the spring, so that the push button is closed to the casing. It has a first arrangement position protruding from the end surface of the body piece and a second arrangement position that is engaged with the second protrusion and is on the same surface as the end surface, and the inner wall of the casing has a first arrangement position,
A hand-type push button switch having a mounting part forming first and second grooves into which the mounting end of the switch mechanism part is mounted at different positions in the pressing direction corresponding to the second arrangement position. The purpose is to provide.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 shows the hand-type push button switch of the present invention, in which the switch mechanism section 11 to which the cord 10 is connected is attached to the mounting section 35 of the housing 30, and the switch mechanism section 11 protruding from the switch mechanism section 11 is attached. A spring 13 is attached to a rod 12 for use, and one end of the spring 13 is fitted into a hollow push button 20.

As shown in FIG. 4, the push button 20 has a substantially semicircular protrusion 22 with legs 21 attached to the bottom of a hollow cylinder, and a portion to be held by the protrusion is cut out and a protrusion 23 is provided. It's structured.

As shown in FIGS. 5a, b, and c, the casing 30 includes:
A housing piece 31, which looks like a cylinder divided vertically, is also assembled. A semicircular notch 32 for arranging the push button 20 is provided on the end surface 38 of the housing piece 31, and a first protrusion 33 is provided on the inner circumferential wall in contact with the notch 32 and located below the notch 32. A second protrusion 34 is provided at a position that does not overlap the first protrusion 33 when viewed from above. Furthermore, a mounting portion 35 for the switch mechanism portion 11 is provided below and in the center.
The protrusions 36a and 36b of the mounting portion 35 form first and second grooves 36a' and 36b' on the upper and lower sides. The switch mechanism section 11 is connected to its mounting end 14 (Figs. 3 and 6).
For example, if the cross section of Figure a and Figure 7 a) is L-shaped,
The groove 36 is arranged according to the position of the push button 20.
It is inserted into either a' or 36b' and attached.

FIGS. 6a and 6b and FIGS. 7a and 7b are views showing the push button 20 disposed in the housing 30 (indicated by a housing piece 31). Figure 6 a and b are push buttons 2
0, the push button 20 is attached to the switching rod 12 by a spring 13 and is biased upward to be in an inoperative state.
(FIG. 3), the protruding piece 22 is brought into contact with the first protrusion 33 of the housing piece 31, and a part of the cylinder is made to protrude from the notch 32 and is locked. At this time, the protruding piece 23 of the push button 20 also comes into contact with the back surface 37 near the notch 32 on one end surface 38 of the housing. When the push button 20 is disposed in the first disposed position protruding from the end face 38, the mounting end 14 of the switch mechanism portion 11 is mounted in the first groove 36a' of the mounting portion 35. When the surface 24 of the push button 20 is pressed, the back surface 25 of the surface 24 comes into contact with the rod 12, and the rod 12 is pushed in to operate the switch mechanism section 11. push button 20
The protruding piece 22 comes into contact with the protruding piece 39 of the mounting portion 35 and stops.

FIGS. 7a and 7b show a second arrangement position of the push button 20, in which the push button in the first arrangement position is rotated by 90 degrees. The push button 20 in the non-actuated state is biased upward to bring the protrusion 22 into contact with the second protrusion 34 and engage the surface 24 so that it is located on the same plane as the end surface 38 of the housing piece 31. It has been stopped. At this time, the switch mechanism section 11
has its mounting end 14 in the second groove 3 of the mounting part 35.
It is attached to 6b'. When the push button 20 in the second arrangement position is pressed, the rod 12 is pushed in to operate the switch mechanism 11, and the protrusion 23 is attached to the mounting part 35.
It comes into contact with the protruding piece 39 and stops. In the second arrangement position (FIGS. 7a and 7b), when the push button 20 is pressed, the protruding piece 23 comes into contact with the protruding piece 39 of the mounting portion 35 and functions as a stopper.
However, since this stopper function can be provided to the switch mechanism section 11 itself, the protrusion 23 is not an essential member. Note that the housing 30 is
Since the configuration is such that the housing pieces 31, 31, which are vertically divided, are assembled together, the push button 20 is rotated 90 degrees and the switch mechanism section 11 is mounted so that the mounting end 14 of the switch mechanism section 11 is attached to the mounting section 35. 1. Second groove 36
It is easy to fit into one of a' and 36b' and change from the first arrangement position to the second arrangement position, or vice versa.

In this way, the push button 20 can be arranged alternately between the first arrangement position where it protrudes from the end surface 38 of the housing piece 31 and the second arrangement position where it is on the same plane as the end surface 38. It can be used depending on the usage, such as placing it in the first position when you want to prevent malfunction, and placing it in the second position when you do not want it to malfunction. Further, the structure is simple because the button 20 is provided with protrusions 22 and 23, and the housing piece 31 is provided with protrusions 33 and 34 whose positions are different in the pressing direction and in the direction perpendicular to this. . In addition, push button 2
0, the leg 21 hits the mounting part 35 and the push button is prevented from rotating (Fig. 6b,
Figure 7b).

Figure 8a shows the auxiliary band 4 for convenient handling.
0 shows a hand-type push button switch installed. The auxiliary band 40, for example, as shown in FIG. 8b, is made by attaching hook-and-loop fasteners 43a, 43b, 44a, and 44b to the front and back sides of long and short leather belts 41 and 42 that are crossed in a cross pattern, respectively, in pairs. It consists of By wrapping the shorter leather band 42 around the housing 30 and forming a loop with the longer leather band 41, a gap 46 is formed into which the back of the hand is inserted. Then, it is used as shown in FIG. 8c. When used with the auxiliary band 40 attached, the housing 30 can be held with the back of the hand.
The fingers other than the thumb 46 that press the push button 20 need only lightly touch the housing 30, making use easier.

As is clear from the above description, in the hand-type push button switch of the present invention, the push button, which is biased outward by the spring in the switch mechanism housed in the housing, resists the bias. In a hand-type push button switch that is operated by pressing the switch, the housing is made up of vertically divided housing pieces assembled together.
On the inner wall of the housing, there is a first protrusion and a second protrusion whose position is changed from the first protrusion in the pressing direction and in the circumferential direction.
A protrusion is provided, and a protrusion piece is formed around the push button, and the push button protrudes from the end surface of the housing piece by being engaged with the first protrusion against the bias of the spring. It has a first arrangement position and a second arrangement position that is locked to the second protrusion and is on the same surface as the end surface, and the inner wall of the housing has the first and second arrangement positions, respectively. Since it has a mounting part that forms first and second grooves into which the mounting end of the switch mechanism part is mounted at correspondingly different positions in the pressing direction, the push button can be inserted from the end surface of the housing piece of the housing. Since it can be protruded (first placement position) or flush with the end face (second placement position), it can be used to prevent malfunctions, or to be used according to normal usage or usage. Furthermore, the structure is simple, and the switch mechanism, push buttons, and other parts can be easily assembled and maintained, which is an extremely desirable effect.

[Brief explanation of drawings]

1 and 2 are views showing a conventional hand-type push button switch and a sectional view of its switch mechanism, FIG. 3 is a sectional view of the hand-type push button switch of the present invention, and FIG. 4 is a sectional view of the switch mechanism. Figures 5a, b, and c are respectively a front view of the casing piece of the switch in Figure 3, a cross-sectional view of the front view viewed from the left, a top view, and Figure 6. Figures a and b are longitudinal cross-sectional views of the push button arranged in the first arrangement position, respectively, with different viewing directions, and Figures 7 a and b are respectively longitudinal sectional views of the push button arranged in the second arrangement position. Vertical cross-sectional view of each button with different viewing directions,
Figures 8a, b, and c are diagrams showing a hand-type push button switch with an auxiliary band attached, a developed view of the auxiliary band, and an explanatory diagram illustrating how to use the hand-type push button switch with an auxiliary band attached. It is. 11... Switch mechanism section, 20... Push button, 22, 23... Protruding piece, 30... Housing,
31... Housing piece, 33... First protrusion, 34
......Second protrusion, 35...Mounting part, 40...
...Auxiliary band.

Claims (1)

[Scope of utility model registration request] In the hand-type push button switch, the switch mechanism 11 housed in a housing 30 is actuated by pressing the push button 20, which is urged outward by a spring 13, against the urging. The housing is formed by assembling vertically divided housing pieces 31, 31, and on the inner wall of the housing there is a first protrusion 33 and a position from the first protrusion in the pressing direction and in the circumferential direction. A modified second protrusion 34 is provided, a protrusion 22 is formed around the push button, and the push button is pressed against the bias of the spring 13 so that the protrusion 34 contacts the first protrusion. a first arrangement position where it is engaged and protrudes from the end surface 38 of the housing piece; and a second arrangement position where it is engaged with the second protrusion and is flush with the end surface; First and second grooves 36a', in which the mounting end 14 of the switch mechanism section is mounted at different positions in the pressing direction, corresponding to the first and second arrangement positions, respectively, are formed on the inner wall of the housing.
A hand-type push button switch characterized in that it has a mounting portion 35 forming a portion 36b'.