KR101090503B1

KR101090503B1 - Electromagnetic switching device

Info

Publication number: KR101090503B1
Application number: KR1020100100788A
Authority: KR
Inventors: 이상진
Original assignee: 엘에스산전 주식회사
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-12-07

Abstract

An electronic switching device is disclosed that can reduce vibrations and noises generated during operation. The actuator included in the electronic switching device includes a coil for generating a magnetic force, a fixed core disposed inside the coil, a movable core disposed to approach and be spaced apart from the fixed core, and one end connected to the movable contact and fixed core. The other end is connected to the movable core through the shaft, and is disposed elastically between the movable contact and the protrusion, the shaft including a projection formed from at least a part of the outer surface, and is compressed and in contact with the fixed core when the movable contact is separated The process of the shaft being lowered by separating the movable contact from the fixed contact by being placed on the upper side of the fixed core by being made of a contact spring that resists the movement of the shaft and cushions it, a spring support member interposed between the contact spring and the protrusion, and a flexible material. The first buffer member for supporting the lower surface of the spring support member during some intervals. Accordingly, the first shock absorbing member reduces the shock generated when the movable contact is separated from the fixed contact by the actuator, thereby reducing the noise generated during the operation of the actuator.

Description

Electronic switchgear {ELECTROMAGNETIC SWITCHING DEVICE}

The present invention relates to an electronic switchgear, and more particularly to an electronic switchgear for controlling the supply of current.

Electronic switchgear is a kind of electrical contact switch for supplying or stopping a current, it can be used in various industrial equipment, machinery and vehicles.

The conventional electronic switchgear includes a fixed contact, a movable contact and an actuator. The actuator raises the movable contact to the maximum to bring the movable contact into contact with the stationary contact. Then, the actuator lowers the movable contact so that the movable contact is separated from the fixed contact. On the other hand, the electronic switch is mounted on the vehicle, the vibration and noise is generated in the process of operating the actuator inside the electronic switch to supply a current to the specific parts inside the vehicle, the vibration and noise is transmitted to the driver There is a problem that reduces the quietness inside the vehicle.

An object of the present invention is to provide an electronic switching device that can reduce the vibration and noise generated during the operation.

Electronic switching device according to the present invention for achieving the above object is a fixed contact, a movable contact disposed to be in contact with and detachable from the fixed contact, the actuator for driving the movable contact so that the movable contact is in contact with and separated from the fixed contact The actuator includes a coil for generating a magnetic force, a fixed core disposed inside the coil, a movable core disposed to approach and be spaced apart from the fixed core, and one end connected to the movable contact and penetrating the fixed core to the other end. Is connected to the movable core, the shaft including a protrusion protruding from at least a part of the outer surface, and is elastically disposed between the movable contact and the protrusion, and in contact with the fixed core when the movable contact is detached to compress the shaft. A contact spring for cushioning with resistance, a spring support member interposed between the contact spring and the protrusion, and a flexible material A yirueojyeoseo is disposed on the upper side of the fixed core comprises a first cushioning member for the movable contact is separated from the fixed contact of the spring support member for supporting the lower partial section in the course of the shaft is falling.

The electronic switching device according to the present invention can reduce the noise generated during operation of the actuator by reducing the impact generated in the process of separating the movable contact from the fixed contact by the actuator.

In addition, by forming a plurality of protrusions on the upper surface of the first buffer member, by increasing the time the shock is absorbed by the protrusions included in the first buffer member, the impact caused by the lowering of the shaft can be more effectively reduced. .

In addition, the actuator further includes a reinforcing member, so that when the external force acts on the first buffer member, the first buffer member is deformed to the shaft side only. Accordingly, the external force is applied to the first shock absorbing member so that the hollow of the first shock absorbing member does not open, thereby preventing a phenomenon in which the shaft is excessively moved downward and detached during the descending process.

1 is a cross-sectional view of the electronic switching device according to an embodiment of the present invention.
FIG. 2 is a sectional perspective view showing a part of the electronic switching device shown in FIG. 1. FIG.
3 is a perspective view showing a first buffer member and a reinforcing member of the actuator in the electronic switching device shown in FIG.
4 and 5 are enlarged views of a region A of the electronic switchgear shown in FIG. 1, and a cross-sectional view illustrating a process of deforming the first buffer member by a spring support member.
6 is a cross-sectional view showing a modification of the actuator included in the electronic switching device of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same components, and repeated descriptions and detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted. Embodiments of the present invention are provided to more completely describe the present invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for clarity.

1 and 2, the electronic switch 100 according to a preferred embodiment of the present invention includes a fixed contact 110, a movable contact 120, and an actuator 130.

The fixed contact 110 may be fixed to the case 101. The case 101 may be a rectangular parallelepiped having an accommodation space therein. The fixed contact 110 may be formed of a plurality, and may be disposed to be spaced apart from each other by a predetermined distance (S). Each of the fixed contacts 110 may be electrically connected to fixed terminals 102 extending to protrude out of the case 101.

The movable contact 120 is disposed inside the case 101 to be in contact with and detachable from the fixed contact 110. The movable contact 120 is in contact with the fixed point 110 to allow electricity to flow, or the movable contact 120 is separated from the fixed point 110 to prevent electricity from flowing. As an example of the shape of the movable contact 120, it may be made of a bar type (bar type) of a specific length to be in contact with the two fixed contacts (110) at the same time.

The actuator 130 drives the movable contact 120 such that the movable contact 120 is in contact with and separated from the fixed contact 110.

In the electronic switching device 100 according to an embodiment of the present invention, the actuator 130 is a coil 131, a fixed core 132, a movable core 133, a shaft 134, and a pressure spring ( 135, a spring support member 136, and a first buffer member 137.

The coil 131 generates a magnetic force. The coil 131 may be wound around the bobbin 152. The bobbin 152 may be configured in a cylindrical shape. A frame 151 may be provided around the coil 131 to form a magnetic path.

The fixed core 132 is disposed inside the coil 131. More preferably, the fixed core 132 may be disposed on an inner side of the bobbin 152. One region of the fixed core 132 may be fixedly coupled to the frame 151 forming the outer shape of the actuator 130. The fixing core 132 is formed with a receiving portion 132a in which the protrusion 134a of the shaft 134, which will be described later, is accommodated. The protrusion 134a of the shaft 134 is moved along the receiving portion. In the process of moving the shaft 134, the receiving portion 132a guides the protrusion 134a, the movement of the shaft 134 can be made stable.

The movable core 133 is disposed to be approached and spaced apart from the fixed core 132. In more detail, the movable core 133 is arranged to be accessible and spaced apart from the fixed core 132 inside the bobbin 152. The inside of the bobbin 152 may be provided with a guide 153 for guiding the movement of the movable core 133. A blocking part 154 may be formed on the bottom surface of the guide 153. The blocking part 154 allows the end of the movable core 133 to contact when the movable contact 120 is separated.

Meanwhile, a return spring 138 may be interposed between the fixed core 132 and the movable core 133. The return spring 138 applies an elastic force to move the movable core 133 away from the fixed core 132 to return the movable core 133 to the initial position.

One end of the shaft 134 is connected to the movable contact 120 and the other end is connected to the movable core 133. The shaft 134 is formed to penetrate the fixing core 132. The shaft 134 includes a protrusion 134a protruding from at least some outer surface. One end of the shaft 134 may be inserted into and fixed to the center of the movable core 133. As a result, the shaft 134 may be integrally moved when the movable core 133 moves. The other end of the shaft 134 may be coupled to the movable contact 120. The through contact may be formed in the movable contact 120 to insert the end of the shaft 134. The through hole may be formed through the central region of the movable contact 120. An end of the shaft 134 may be coupled to the inside of the through hole of the movable contact 120 so as to be relatively movable.

The contact spring 135 is elastically disposed between the movable contact 120 and the protrusion 134a. The contact spring 135 contacts the fixed core 132 when the movable contact 120 is separated, compresses the resistance by moving the shaft 134 while being compressed. One example of the contact spring 135 may be a compression coil spring. Thereby, the movable contact 120 can maintain a contact state with the fixed contact 110 at a predetermined pressure or more (contact pressure).

The contact spring 135 may be formed to have a length that can be spaced a predetermined distance from the end of the receiving portion 132a of the fixed core 132 during the non-compression. Here, the separation distance between the contact spring 135 and the end of the receiving portion 132a of the fixed core 132 may be formed shorter than the moving distance of the movable core 133. This is because the contact spring 135 is the end of the receiving portion 132a of the fixed core 132 before the end of the movable core 133 is in contact with the blocking portion 154 of the guide 153 upon detachment of the movable contact 120. This is to make contact with first. As a result, the contact spring 135 generates an elastic force that acts in the opposite direction to the moving direction of the movable core 133 and the shaft 134 when the movable contact 120 is separated, thereby moving the movable core 133 and the shaft 134. By reducing the speed, the impact force may be alleviated when the movable core 133 is in contact with the blocking unit 154. By this, noise generation can be suppressed.

The spring support member 136 is interposed between the contact spring 135 and the protrusion 134a. The spring support member 136 may be formed to have an extended size compared to the pressure spring 135.

The first buffer member 137 supports the lower surface of the spring support member 136 during a portion of the process in which the movable contact 120 is separated from the fixed contact 110 and the shaft 134 descends. The first buffer member 137 for this purpose is made of a flexible material is disposed on the upper side of the fixed core (132). The first buffer member 137 may be formed in a ring shape.

The movable contact 120 is separated from the fixed contact 110 so that the spring support member 136 and the first buffer member 137 collide while the shaft 134 descends. When the first buffer member 137 is compressed and primarily absorbs shock, and the compression force generated at this time is greater than the initial mounting force of the contact spring 135, the first buffer member 137 and the contact spring 135 is At the same time it compresses and absorbs the shock secondarily.

The electronic switching device 100 having the structure as described above has an actuator by reducing the impact generated in the process of separating the movable contact 120 from the fixed contact 110 by the actuator 130 by the first buffer member 137. It can reduce the noise generated during the operation of.

Meanwhile, a plurality of protrusions 137a may be formed on the top surface of the first buffer member 137. In general, the force decreases as the time the force is applied in the state that the impact amount is not changed. By increasing the time the shock is absorbed by the protrusion 137a included in the first buffer member 137, the impact (force) caused by the lowering of the shaft 134 can be more effectively reduced.

Meanwhile, referring to FIG. 4, the actuator 130 may further include a reinforcing member 139. The reinforcing member 139 is made of a material having a higher rigidity than the first buffering member 137 and is formed to surround the circumferential surface of the first buffering member 137. One example of the shape of the reinforcing member 139 may be a ring type. The reinforcing member 139 may be made of a metal material. When the external force acts on the first shock absorbing member 137, the reinforcing member 139 causes the first shock absorbing member 137 to be deformed only on the shaft 134 side. Accordingly, the external force is applied to the first buffer member 137 so that the hollow of the first buffer member 137 does not open, thereby preventing the shaft 134 from being excessively moved downward in the process of descending, thereby preventing the phenomenon of detachment. can do.

Meanwhile, referring to FIGS. 4 and 5, the first buffer member 137 may be disposed to be spaced apart from the shaft 134 by a predetermined distance. More preferably, the first buffer member 137 may be disposed to be spaced apart from the protrusion 134a of the shaft 134 by a predetermined distance.

As shown in FIG. 4, when the shaft 134 is raised so that the movable contact 120 (see FIG. 1) comes into contact with the stationary contact 110 (see FIG. 1), the first shock absorbing member 137 may move to the shaft ( Since the first buffer member 137 does not interfere with each other, the protrusion 134a of the shaft 134 is spaced apart from the predetermined distance 134. Accordingly, the shaft 134 may be smoothly moved toward the stationary contact 110 (see FIG. 1).

In addition, the movable contact 120 (see FIG. 1) is separated by the fixed contact 110 (see FIG. 1), and the elastic force of the return spring 138 is in the process of moving the shaft 134 away from the fixed contact 110 (see FIG. 1). The shaft 134 is lowered by this. In this case, as shown in FIG. 6, the spring support member 136 also descends together with the shaft 134 and compresses the first buffer member 137. Here, since the reinforcing member 139 is disposed on the outer surface of the first buffer member 137, the outer circumferential surface of the first buffer member 137 is not deformed, and only the inner surface of the first buffer member 137 is shafted. It is deformed to be in contact with the protrusion 134a of 134. Accordingly, the movement of the shaft 134 is interfered by the first buffer member 137. Accordingly, the moving speed of the shaft 134 is reduced to reduce the shock transmitted to the members around the shaft 134.

In addition, a power relay assembly (PRA) and a battery pack in a vehicle in which the electronic switch device 100 (refer to FIG. 1) having the above-described structure may be mounted may have a main resonance frequency in a low frequency region of less than 1 kHz. It is likely to be amplified by vibrations in the low frequency region generated by the electronic switchgear. The noise characteristics of the electronic switchgear unit are generally high in the high frequency range of 3㎑ ~ 10㎑. However, when the electronic switchgear is actually mounted on a vehicle, the noise and vibration of the low frequency region of 1㎑ or less may cause resonance of the structure in the vehicle. It can be amplified by and easily transmitted to the indoor driver. More specifically, in the case where the electronic switching device does not include the first buffer member, the shaft is a low frequency region of about 1 kHz or less while being attenuated up and down while compressing and restoring with the return spring 138. Causes noise and vibration.

However, as described above, the electronic switching device 100 (refer to FIG. 1) of the present invention converts the noise into a noise by the first buffer member 137 interfering with the movement of the shaft 134 while the shaft 134 is lowered. Energy consumption is reduced and noise reduction effect is especially excellent in the low frequency range below 1 kHz.

On the other hand, as a modification of the above-described actuator 130, it may further include a second buffer member 140 (see Fig. 6).

The second buffer member 140 (see FIG. 6) is disposed between the protrusion 134a of the shaft 134 and the spring support member. The second buffer member 140 (see FIG. 6) may be made of a soft material. An example of the material of the second buffer member 140 (see FIG. 6) may be rubber or silicone. The movable contact 120 is separated from the fixed contact 110 so that the spring support member 136 and the first buffer member 137 collide while the shaft 134 descends. When the first buffer member 137 is compressed and primarily absorbs shock, and the compression force generated at this time is greater than the initial mounting force of the contact spring 135, the first buffer member 137 and the contact spring 135 is At the same time it compresses and absorbs the shock secondarily. In this process, the shaft 134 is continuously lowered by the elastic force of the return spring 138, and the protrusion 134a of the shaft 134 is separated from the spring support member 136. In addition, when the pressure spring 135 is compressed and returned to its original state, the protrusion 134a of the shaft 134 is in contact with the spring support member 136, and is disposed between the protrusion 134a and the spring support member. The shock generated between the protrusion 134a and the spring support member may be absorbed by the buffer member 140 (see FIG. 6).

Meanwhile, returning to FIG. 1, an operation process of the electronic switch device 100 having the above-described structure will be described.

First, when the electronic switching device 100 allows a current to flow, power is applied to the coil 131 and magnetic flux is generated around the coil 131. Accordingly, the movable core 133 is moved in a direction in which the magnetoresistance decreases, that is, in a direction approaching the fixed core 132. When the movable core 133 is moved to the fixed core 132 side, the return spring 138 is compressed to accumulate elastic force. The shaft 134 is moved at the same time as the movable core 133 is moved, and the movable contact 120 is in contact with the fixed contact 110 to enable energization. At this time, the shaft 134 is moved relative to the movable contact 120 after the movable contact 120 is in contact with the fixed contact 110, the contact spring 135 is compressed, thereby the elastic force of the contact spring 135 By this, the movable contact 120 maintains a contact state with a predetermined contact pressure at the fixed contact 110.

On the other hand, when the electronic switch 100 is to cut off the current supply, the power supply of the coil 131 is stopped. As a result, the magnetic force generation of the coil 131 is stopped, and the movable core 133 is returned to the initial position by the elastic force of the return spring 138. As the movable core 133 is moved, the shaft 134 is moved, and the movable contact 120 is separated from the fixed contact 110. When the shaft 134 continues to move, the spring support member 136 contacts the end of the receiving portion 132a of the fixed core 132. If the shaft 134 continues to move, the protrusion 134a is received inside the receiving portion 132a, and the contact spring 135 is compressed because the elastic force of the return spring 138 is stronger, thereby increasing the elastic force. Since the elastic force of the contact spring 135 acts opposite to the moving directions of the shaft 134 and the movable core 133, the moving speed of the movable core 133 and the shaft 134 may be reduced. When the movable core 133 is returned to the initial position, the end of the movable core 133 and the blocking portion 154 are in contact with each other. At this time, since the speed of the movable core 133 is reduced, shock noise may be prevented from occurring. Can be.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

100: electronic switchgear 101: case
102: fixed terminal 110: fixed contact
120: movable contact 130: actuator
131: coil 132: fixed core
133: movable core 134: shaft
135: pressure spring 136: spring support member
137: first buffer member 138: return spring
139: reinforcing member 140: second buffer member

Claims

An electronic switching device comprising a fixed contact, a movable contact disposed to be in contact with and detachable from the fixed contact, and an actuator for driving the movable contact such that the movable contact is in contact with and separated from the fixed contact.
The actuator is:
A coil for generating a magnetic force;
A fixed core disposed inside the coil;
A movable core disposed to be approached and spaced apart from the fixed core;
A shaft having one end connected to the movable contact and penetrating the fixed core and the other end connected to the movable core, the shaft including a protrusion protruding from at least a portion of the outer surface;
A contact spring elastically disposed between the movable contact and the protruding portion, the contact spring compresses by contacting the fixed core and compresses the movement of the shaft while separating the movable contact;
A spring support member interposed between the contact spring and the protrusion; And
And a first buffer member made of a soft material and disposed on an upper side of the fixed core to support the lower surface of the spring support member during a period in which the movable contact is separated from the fixed contact and the shaft descends. .

The method of claim 1,
The actuator is,
Electronic opening and closing device further comprises a reinforcing member made of a material having a higher rigidity than the first buffer member to surround the circumferential surface of the first buffer member.

The method of claim 2,
The first shock absorbing member is disposed so as to be spaced apart from the shaft by a predetermined distance.

The method of claim 1,
Electronic opening and closing device characterized in that a plurality of protrusions are formed on the upper surface of the first buffer member.

The method of claim 1,
The actuator is,
And a second buffer member disposed between the protrusion of the shaft and the spring support member.