JP2782144B2 - Door open / closed detection 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 door open / close detection switch which detects the opening / closing of a door and issues an on / off operation.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a conventional door open / close detection switch.
The reed switch D is installed at an appropriate position on the door B by opening and closing the door A by rotating the door B about the axis C with respect to the door A. Then, a magnet E is installed at a position corresponding to the reed switch D on the periphery of the entrance A, and utilizes the configuration of the reed relay.

The operation principle of the above-described reed relay for detecting the opening and closing of a door will be briefly described. The reed switch is composed of two ferromagnetic reeds which are opposed to each other with a predetermined contact interval at the center. Holds the position and is enclosed in a glass tube. Nitrogen gas is sealed in the glass tube in order to prevent activation of the contact, thereby improving reliability and extending the life. An auxiliary magnet is provided on the back of the reed switch with such a structure, and when the magnet is swung and a strong magnetic field fluctuation exceeding a certain level that the reed switch senses is applied from the outside, the reed is magnetized by the auxiliary magnet. As a result, the free ends of the opposing leads are pulled toward each other and come into contact with each other to close the circuit, and the switch is turned on.
Conversely, when the magnet is approached, a weak magnetic field below a certain level that the reed switch does not respond to is generated, the free end returns to the old position due to the elasticity of the reed itself, the circuit is opened, and the switch is turned off.

In the conventional apparatus shown in FIG. 7, when the door B is closed and the reed switch D and the magnet E are in proximity to each other and there is no relative movement between the two, the reed switch D is turned off and the circuit is turned off. Is opened and the device is connected to the alarm, no alarm is activated, but the door B is opened and the position shifts between the two, and the magnet E
Fluctuates in the magnetic field in the reed switch D due to
The circuit is closed by the magnetization of the reed, the reed switch D is turned on, and a separate alarm is activated to emit an alarm sound. Although not shown, this system can also be applied to a system in which a door moves linearly, that is, a so-called sliding door system, and it is apparent that the same effect can be obtained.

FIG. 8 shows another conventional example. The features of this conventional device are that the opening and closing operation of the alarm circuit is performed on one common support F, and that the configuration of the alarm circuit does not use the method of a reed relay consisting of a reed switch and a magnet. That is, a direct energization method using mutual contact is adopted.

Referring to FIGS. 8A and 8B, the axis G
The pendulum bar H supported to be able to swing freely can swing inside the frame J. When this device is mounted on a door by the support F, as a point of mounting, when the pendulum bar H swings around the axis G in response to the opening and closing operation of the door, the swing of the pendulum bar H is directly caused by the opening and closing motion of the door. It is necessary to mount in the direction in which the acceleration of motion is added, in other words, to mount in the direction corresponding to the effective detection operation surface determined according to the opening and closing direction of the door.

[0007] With this mounting, when the door is stationary, the pendulum bar H hangs down and remains stationary, so that the pendulum bar H and the frame J are separated from each other, and the electric circuit between them. The alarm is not activated because is shut off. When the door moves and the pendulum bar H swings in the direction of the arrow, and the lower side surface of the pendulum bar H comes into contact with the inner surface of the frame J, an alarm is issued via the shaft G, the pendulum bar H and the frame J. Is configured, whereby the alarm can be activated to generate an alarm sound.

FIGS. 9 and 10 show still another conventional device. In FIG. 9, the vibrating sphere K is held in a suspended state by springs L, L attached to the upper and lower sides, and is detected by the vibrating sphere K coming into contact with the metal plates M, M opposed to each other by swinging. It is arranged to constitute an electric circuit for alarm via the circuit N. Also, the one in FIG.
The vibrating rod P is swingably suspended by a shaft Q, and when the tip of the vibrating rod P comes into contact with the metal plates M, M installed opposite to each other by swinging, an alarm is issued via a detection circuit N. They are arranged to form an electric circuit.

[0009]

However, each of the above-mentioned conventional devices has the following problems. That is, (1) The conventional apparatus shown in FIG. 7 can reliably detect the opening of the door of about 5 mm to about 10 mm by utilizing the high sensitivity capability of the reed switch. Although it is highly reliable, one of the reed switch D and the magnet E is restricted by the restriction that it must be installed at the periphery of the entrance A,
There is a problem that the field of application is significantly narrowed.

(2) The conventional device shown in FIG. 8 has the advantage that the entire device is assembled into a single set and incorporated into the support F, and can be mounted collectively on the door, especially in handling. However, the shaft G, the pendulum bar H and the frame J are all made of metal products, and the pendulum bar H
It is necessary to polish each contact surface of the frame and the frame J sufficiently to obtain a good conduction state, and the contact time between the two by the swing is very short. However, there is a problem that high reliability cannot be obtained even if the method is performed.

(3) Both of the conventional devices shown in FIGS. 9 and 10 are similar in basic configuration to those shown in FIG. By contacting the metal plate and closing the alarm circuit,
9 is slightly different from that in FIG. 8 in that the vibrating sphere K in FIG. 9 is supported in a movable manner in all directions. On the other hand, the pendulum bar H shown in FIG. 8 and the vibrating bar P shown in FIG. 10 are all in a supporting mode in which the swing direction is restricted to a predetermined direction by a shaft that supports the swing. In all other respects, the structures are similar in that an alarm circuit is formed by contacting the surfaces of the metal bodies with each other for a very short time. Therefore, the problems involved are the same as those of FIG. Therefore, there is a need for improvement in the reliability of the circuit configuration.

The present invention is constrained by the problem of the prior art, that is, the restriction that one of the magnet and the reed switch must be installed at the periphery of the entrance as in the conventional device of FIG. In addition, the problem is that the field of application is significantly narrowed, and as in the conventional apparatus shown in FIGS. It is made in consideration of the problem that the contact surface to be polished must be sufficiently polished and placed, and by applying the configuration of the lead relay to the ON / OFF operation part of the detection switch, the reliability of the configuration of the detection circuit is improved. The magnet and the reed switch can be housed in one common support, and a part is installed around the entrance and exit. Aims at to solve the mounting problems that derive from the conventional system that must, moreover provides a door opening and closing detection switch capable of selecting a site at any position on the door against the door.

[0013]

In order to achieve the above object, the invention of claim 1 includes a reed switch and a magnet, and the door is opened and closed by a change in distance between the two when the door is opened and closed. A door open / close detection switch that detects opening / closing and generates an on / off operation, wherein a support member to which the reed switch is fixed and attached to a door, and one end portion of which can swing on a side of the support member where the reed switch is located And a pendulum-type movable body that causes a reciprocating reciprocating motion of the magnet passing near the reed switch by movement of the support by opening and closing the door, and a magnet fixed to the other end. The magnet moves away from or close to the reed switch as it moves, causing a change in the magnetic field on the reed switch and causing on / off operation. Are those, wherein pendulum movable body,
The lower end is circular and heavy as viewed from the front, the lower end is supported by a support so as to be able to swing horizontally, and a magnet is mounted on the upper part.

[0014]

According to the first aspect of the present invention, when the door at the entrance provided with the door open / close detection switch is opened for entry / exit, the pendulum type movable with respect to the reed switch on the same support attached to the door. As the body repeatedly moves back and forth in response to the opening movement of the door, and the magnet passes near the reed switch, a change occurs in the magnetic field of the reed switch to cause an on / off operation based on the principle of the reed relay. Originally, the on / off operation of the reed switch is provided with an auxiliary magnet on the back side of the reed switch, and when the magnet is located in front of the reed switch, the reed switch leads (contact piece) are separated ( Although the magnetic field is constant), it is in the off state, but when the magnet moves away from the reed switch, the magnetic field fluctuates, and the contact pieces in the reed switch are short-circuited and turned on. In particular, since the lower end of the pendulum type movable body is circular and heavy when viewed from the front, and the lower end is supported by the support so as to be able to swing horizontally and a magnet is mounted on the upper part, the door When the change in the opening / closing operation is small, the magnet causes a reciprocating reciprocating motion passing in the vicinity of the reed switch in response to the opening / closing operation sensitively, and turns the reed switch on or off.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 illustrates an embodiment (FIG. 6) of the present invention.
FIG. 5 is a diagram showing a reference example of the door open / close detection switch of FIG. FIG.
In the figure, reference numeral 1 denotes a support for supporting a set of devices. One end of a shaft 2 is implanted above the support, and a pendulum bar 3 is suspended from the other end so as to be able to swing around the shaft 2. At the tip of the pendulum rod 3, a magnet 4 is fixed.
It is possible to swing together. Reference numeral 5 denotes a reed switch, which is provided substantially vertically along the side of the support 1 where the magnet 4 is provided, and a lead wire 6 constitutes an alarm circuit with an alarm (not shown). The relative position between the magnet 4 and the reed switch 5 is as follows.
At the same time, when the reed switch 5 is suspended by the shaft 2 and is in a stationary state, the reed switch 5 is provided at a close distance to the magnet 4 so that the longitudinal direction thereof is in a relationship position substantially coincident with the suspension direction of the pendulum bar 3. ing. The fitting portion between the other end of the shaft 2 and the pendulum bar 3 is fitted in a state in which the frictional resistance is extremely small, so that even if the support 1 moves only a short distance in the left-right direction, the magnet 4 is not moved. When the magnet 4 separates from the reed switch 5, the magnetic field provided by the reed switch 5 changes as a result of swinging in the left-right direction together with the pendulum bar 3, causing the reed relay to be turned on and connected to the reed switch. Generates an alarm sound for the alarm. As described above, when the door open / close detection switch is used for generating an alarm sound, a timer is inserted in the circuit, and when the reed relay is turned on, the state is maintained for a predetermined time. This is more effective.

FIG. 2 illustrates an embodiment (FIG. 6) of the present invention.
FIG. 7 is a diagram showing another reference example of a door open / close detection switch for
You. FIG. 2 shows an example in which the longitudinal direction of the reed switch 5 attached to the support 1 is substantially horizontal as compared with the case of FIG. By the lateral movement of the support 1,
The operation of the alarm circuit by causing a change in the magnetic field of the reed switch 5 when the magnet 4 separates from the reed switch 5 is the same as that in FIG.

In FIGS. 1 and 2, in order to swing the magnet 4 in the horizontal direction in the drawing, it is necessary to move the support 1 in the horizontal direction. FIGS. 3 and 4 show how to select each mounting mode required for the door surface according to the opening and closing method of the door when the support 1 is mounted on the door. FIG. 3 shows a system in which the door B rotates around the axis C to open and close the entrance A. In this case, the mounting mode of the support 1 includes the swinging directions of the pendulum bar 3 and the magnet 4. It is necessary to mount the support 1 in a direction in which the plane, that is, the effective detection operation surface is a surface perpendicular to the surface of the door B. On the other hand, FIG. 4 shows a system in which the door R linearly moves along the horizontal direction of the upper and lower end surfaces R1 and R2 to open and close the entrance A, that is, a so-called sliding door system. It is necessary to mount the support 1 in a direction in which the plane including the swinging directions of the pendulum bar 3 and the magnet 4, that is, the effective detection operation surface is a surface parallel to the surface of the door R. This means that it is necessary to change the mounting direction with respect to the door by 90 ° according to the type of door to be applied, and if it is to be used as a single shape and to be commonly used, the support It is clear that not only does the shape of the body 1 become inefficient or inconvenient in handling, but also the appearance is impaired from an aesthetic point of view.

FIGS. 5 (a), 5 (b) and 5 (c) show a configuration of a reference example for coping with the above-mentioned requirement, and the support 1 is rotatably accommodated in an outer box 7. FIG. Support 1, as in the reference example of FIG. 1 to FIG. 2, the shaft 2, the pendulum rod 3,
A magnet 4, a reed switch 5 and the like are provided, and an upper shaft 8 is provided at an upper end, and a lower shaft 9 is provided at a lower end. The upper shaft 8 has an operation knurl 10 on the peripheral surface of the upper large diameter portion.
Is processed, and the rotating knurl 11 is processed on the peripheral surface of the small-diameter portion thereunder. In addition, a slot 12 for a minus driver for turning is provided on the top surface of the upper shaft 8.
The upper shaft 8 and the lower shaft 9 are made of a molding resin or the like. The operating knurl 10 is for turning the support 1 by hand from the outside, and therefore, the height of the outside may be set to be slightly higher than the upper surface of the outer box 7 if necessary. On the other hand, the rotating knurl 11 is intended to generate an appropriate frictional resistance between the rotating knurl 11 and the corresponding surface of the outer case 7 to prevent the support 1 from running excessively. In addition, in order to restrict the turning angle of the support 1 to 90 °, a stopper 13 is provided on the upper shaft 8 as shown in FIG. With this configuration, by switching the angle of the support 1 by 90 ° according to the target door opening / closing method, a common detection switch can be mounted in a common mounting manner regardless of the door opening / closing method. , It is possible to obtain a high efficiency in the manufacturing surface of the device as well as the mounting work surface.

FIG. 6 shows a door open / close detection switch according to the present invention.
A front view showing a real施例, where this embodiment differs from the reference example (FIGS. 1 and 2) is to and heavier in the circular pendulum rod 3 watches lower end from the front, the support plate 1 Pendulum stick 3
The magnet 4 mounted on the upper part of the pendulum bar 3 swings in the horizontal direction (left and right direction in the drawing) about the shaft 2 by the shaft 2 passing through the center of the circular lower end of the magnet 4. The reed switch 5 is mounted substantially horizontally on the support plate 1 corresponding to the swinging position of. The operation of the alarm circuit by changing the magnetic field of the reed switch 5 by moving the magnet 4 away from the reed switch 5 by the lateral movement of the support 1 is the same as that of FIGS. 1 and 2. .

[0020] In the above description, by the movement of the support, as an example of a means to cause repetitive reciprocation passes near the reed switch relative to the magnet, the pendulum rod supporting the lower end rotatably And a magnet is attached to the upper end of the magnet, and the example in which the magnet performs a pendulum motion according to the movement of the support is described. However, the reciprocating reciprocating motion is not necessarily limited to the pendulum motion. It is also possible to provide an arc-shaped continuous passage having a gentle slope with the lowest point as the neutral position in the state, and to insert a magnet as a ball rolling along the passage into the passage. Obviously, the same effect can be obtained. Needless to say, the present invention can be applied to an opening / closing body such as a window to detect the opening / closing.

[0021]

The door open / close detection switch according to the present invention is constructed as described above, and has the following effects. According to the first aspect of the present invention, when the support is moved by opening and closing the door, the magnet causes a reciprocating reciprocating motion in which the magnet passes near the reed switch, and the magnet moves away from and close to the reed switch to generate a magnetic field on the reed switch. Since the change is caused to cause the on / off operation, the reliability of the door open / close detection is ensured, and the components can be simplified. Also, with the above configuration, the magnet and the reed switch can be provided on one common support, thereby deriving from the conventional method that one of the members has to be installed on the periphery of the entrance. In addition to being able to solve the problem of mounting, and in addition to being able to select the installation location of the integrated switch with respect to the door at an arbitrary position on the door, the lower end of the pendulum type movable body can be selected. Is circular and heavy when viewed from the front, and the lower end is supported on the support so as to be able to swing horizontally, and a magnet is mounted on the upper part. Sensitive to the opening and closing operation, the reciprocating motion of the magnet passing near the reed switch can be caused.

[Brief description of the drawings]

FIG. 1 illustrates a door open / close detection switch of the present invention.
It is a perspective view which shows the door opening / closing detection switch which is a reference example .

FIG. 2 illustrates a door open / close detection switch of the present invention.
It is a front view which shows the door opening / closing detection switch which is another reference example .

3 is an explanatory diagram showing one mode of use of the door opening and closing detection switch.

4 is an explanatory view showing another mode of use of the door opening and closing detection switch.

[5] FIG. 5 (a) door opening and closing detection switch is a reference example
Sectional view showing still another use mode for, and FIG. 5 (b)
FIG. 5 is a perspective view of the outer shape, and FIG.

6 is a front view showing the actual施例door opening detection switch of the present invention.

FIG. 7 is an explanatory perspective view of a conventional general door open / close detection switch.

FIG. 8A shows a second example of a conventional door open / close detection switch.
FIG. 8B is a side view showing an example, and FIG.

FIG. 9 is a perspective view showing a third example of a conventional door open / close detection switch.

FIG. 10 is a perspective view showing a fourth example of a conventional door open / close detection switch.

[Explanation of symbols]

 Reference Signs List 1 support 2 shaft 3 pendulum bar 4 magnet 5 reed switch 6 lead wire 7 outer box 8 upper shaft 9 lower shaft 10 operating knurl 11 rotating knurl 12 groove 13 stopper

Claims (1)

(57) [Claims] 1. A door opening / closing detection switch having a reed switch and a magnet, and detecting opening / closing of a door and issuing an on / off operation based on a change in a distance generated between the two in response to opening / closing of the door, A support to which a reed switch is fixed and attached to a door, and one end of the support is swingably supported on the side where the reed switch is located, and a magnet is fixed to the other end, and the support is moved by opening and closing the door. And a pendulum-type movable body that causes a reciprocating reciprocating motion in which the magnet passes near the reed switch, and the magnet moves away from and close to the reed switch in accordance with the movement of the support, thereby generating a magnetic field on the reed switch. The pendulum-type movable body has a lower end that is circular when viewed from the front. Weighted, door detection switch, characterized in that the lower end is a magnet to the upper while being swingably supported in the horizontal direction to the support is mounted.