CN210154795U - Manual test switch structure of electromagnetic relay and electromagnetic relay - Google Patents

Abstract

The utility model discloses an electromagnetic relay's manual test switch structure and electromagnetic relay, manual test switch structure includes electromagnetic relay's shell, the knob that is used for driving electromagnetic relay's promotion card along the direction removal of drive electromagnetic relay movable contact spring, and this knob can set up on the shell around its axis rotation, and the knob part stretches into the shell inside to with electromagnetic relay's promotion card cooperation; the shell is provided with a first stopping portion and a second stopping portion, and the first stopping portion and the second stopping portion are located at two ends of the rotary path of the knob respectively to limit the maximum rotary angle of the knob. The utility model discloses can prevent that knob overstroke or stroke are not enough, make the tester change in control knob.

Description

Manual test switch structure of electromagnetic relay and electromagnetic relay

Technical Field

The utility model relates to a relay field especially relates to an electromagnetic relay's manual test switch structure and electromagnetic relay.

Background

At present, in the actual application process of the small-sized control relay in the prior art, once an application device fails, the fault detection is performed on the device itself, and in addition, the abnormal detection is also required to be performed on the relay so as to determine whether the device fails due to the abnormal operation of the relay. When the relay is detected to be abnormal, because the application device cannot work normally, the relay needs to be tested to be abnormal under a non-excitation condition (i.e. under a non-electrified condition). Therefore, a test switch is additionally arranged on a relay shell, the test switch is utilized to drive a pushing card in the electromagnetic relay to move along the direction of a driving movable contact spring, whether the movable contact and a normally open fixed contact can be normally contacted or not is detected, whether the movable contact and the normally closed fixed contact can be normally disconnected or not is detected (for a relay only provided with the normally closed fixed contact), for this purpose, a tool such as a universal meter and the like is generally used for detecting the resistance between a pin corresponding to the movable contact and a pin corresponding to the normally open fixed contact, if the resistance is close to 0, the movable contact and the normally open fixed contact can be normally contacted, and the relay function is normal; if the resistance is infinite, it indicates that the movable contact can not contact with the normally open stationary contact, and the relay is abnormal in function, i.e. the relay is out of order. For a relay only provided with a normally closed stationary contact, if the resistance between a pin corresponding to a movable contact and a pin corresponding to the normally closed stationary contact is infinite, the movable contact and the normally closed stationary contact can be normally disconnected, and the relay functions normally; if the resistance between the pin corresponding to the movable contact and the pin corresponding to the normally closed stationary contact is close to zero, the movable contact and the normally closed stationary contact cannot be normally disconnected, and the function of the relay is abnormal, namely the relay breaks down.

The test switch is mostly realized by adopting a knob, the knob can rotate for 360 degrees, and the knob is mostly designed into a circular structure, so that the rotation angle of the knob is not easy to control, and once the rotation angle is too small, the relay contact is not contacted; once the rotation angle is too large, the contact of the relay is separated again, and the movable spring plate is deformed.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electromagnetic relay's manual test switch structure and electromagnetic relay, it has overcome the background art weak point.

The utility model provides a technical scheme that its technical problem adopted is: a manual test switch structure of an electromagnetic relay comprises a shell of the electromagnetic relay and a knob which is used for driving a pushing clamp of the electromagnetic relay to move along the direction of a movable reed of the electromagnetic relay, wherein the knob is rotatably arranged on the shell around the axis of the knob, and the part of the knob extends into the shell to be matched with the pushing clamp of the electromagnetic relay; the shell is provided with a first stopping portion and a second stopping portion, and the first stopping portion and the second stopping portion are located at two ends of the rotary path of the knob respectively to limit the maximum rotary angle of the knob.

Further, the knob and the shell are matched with a self-locking structure, so that the knob is kept in an opening state or a closing state, when the knob is opened, the knob drives the push card to move along the direction of a movable reed of the driving electromagnetic relay, and when the knob is closed, the knob releases the push card.

Further, the self-locking structure comprises a first self-locking convex part arranged on the shell and a second self-locking convex part arranged on the shell, and the first self-locking convex part and the second self-locking convex part are both positioned on a rotation path of the knob and allow the knob to be driven to rotate; the knob is located between the first stopping portion and the first self-locking convex portion in an open state, and the knob is located between the second stopping portion and the second self-locking convex portion in a closed state.

Further, the self-locking structure comprises a self-locking convex bud arranged on the knob, a first positioning groove arranged on the shell and a second positioning groove arranged on the shell; when the knob is in an open state, the self-locking convex bract is clamped into the first positioning groove, and the knob is allowed to be driven to rotate; when the knob is in a closed state, the self-locking convex bud is clamped into the second positioning groove, and the knob is allowed to be driven to rotate.

Further, the part of the knob, which is positioned outside the shell, is provided with an operation groove.

Further, the knob comprises an operation part, a clamping column arranged at the bottom end of the operation part and a pushing part arranged at the bottom end of the clamping column, the shell is provided with a mounting hole, and the pushing part penetrates through the mounting hole to enter the shell and is matched with a groove arranged on the pushing card; the clamping column is in clearance fit with the mounting hole, and the operating part is positioned outside the shell.

Furthermore, the shell is provided with a first indication mark and a second indication mark which are used for indicating the state of the knob, and the knob is provided with a third indication mark matched with the first indication mark and a fourth indication mark matched with the second indication mark.

Further, the first indication mark is an "ON" character mark, and the second indication mark is an "OFF" character mark; the third indication mark and the fourth indication mark are respectively arrow marks.

Further, the knob is located at the top of the housing, and the first stopping portion and the second stopping portion are located on the top surface of the housing.

The utility model also provides an electromagnetic relay, which comprises a magnetic circuit component, a contact component and a push card, wherein the armature of the magnetic circuit component is connected with the movable reed of the contact component through the push card so as to drive the movable reed through the push card; still include as above-mentioned the utility model discloses an electromagnetic relay's manual test switch structure, magnetic circuit subassembly, contact module, promotion screens are in the shell, the knob stretches into the part in the shell and pushes away card clearance fit.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. because be equipped with first backstop portion, second backstop portion on the shell, first backstop portion and second backstop portion are located respectively the both ends department in knob rotatory route is with the restriction the maximum rotation angle of knob makes the utility model discloses can prevent that knob overstroke or stroke are not enough, also make the tester change in control knob.

2. The arrangement of the self-locking structure can keep the knob in an opening state or a closing state, so that misoperation of the knob is avoided, and the detection process is safer.

3. The self-locking structure preferably selects the first self-locking convex part, the second self-locking convex part or the self-locking convex bud, the first positioning groove and the second positioning groove, so that the self-locking structure can automatically realize self-locking under the corresponding state of the knob, the operation of personnel is not needed, and the operation of the personnel can be simplified.

4. The knob preferably comprises the operation part, a clamping column arranged at the bottom end of the operation part, and a pushing part arranged at the bottom end of the clamping column, and is matched with the mounting hole formed in the shell, so that the knob is high in strength and easy to assemble.

5. First instruction sign, second instruction sign, third instruction sign, fourth instruction sign's setting makes things convenient for the tester to discern the current state of locating of knob fast.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment, and the manual test switch structure of the electromagnetic relay and the electromagnetic relay are not limited to the embodiment.

Drawings

Fig. 1 is an exploded schematic view of a manual test switch according to the first embodiment of the present invention;

fig. 2 is a top view of the manual test switch structure of the present invention with the knob in the open state according to the first embodiment;

fig. 3 is a top view of the manual test switch structure of the present invention with the knob in the off state according to the first embodiment of the present invention;

fig. 4 is an exploded schematic view of an electromagnetic relay according to the first embodiment of the present invention;

fig. 5 is a front view (including a housing) of the electromagnetic relay according to the first embodiment of the present invention when the knob is in the off state;

fig. 6 is a partial cross-sectional view of an electromagnetic relay according to the first embodiment of the present invention, with the knob in the off state;

fig. 7 is a second front view (without housing) of the electromagnetic relay according to the first embodiment of the present invention, when the knob is in the off state;

fig. 8 is a front view (including a housing) of the electromagnetic relay according to the first embodiment of the present invention when the knob is in the open state;

fig. 9 is a partial sectional view of an electromagnetic relay according to the first embodiment of the present invention, with the knob in an open state;

fig. 10 is a second front view (without housing) of the electromagnetic relay according to the first embodiment of the present invention, with the knob in the open state;

FIG. 11 is a schematic structural view of a knob according to a second embodiment of the present invention;

fig. 12 is a partial structural schematic view of a housing according to the second embodiment of the present invention;

fig. 13 is a sectional view of the manual test switch according to the second embodiment of the present invention, with the knob in the closed state;

fig. 14 is a sectional view of the manual test switch according to the second embodiment of the present invention, in which the knob is in an open state.

Detailed Description

Example one

Referring to fig. 1-3, a manual test switch structure of an electromagnetic relay according to the present invention includes a housing 1 of the electromagnetic relay, and a knob 2 for driving a push card of the electromagnetic relay to move along a direction of driving a movable contact spring of the electromagnetic relay, wherein the knob 2 is rotatably disposed on the housing 1 around an axis thereof, and a part of the knob 2 extends into the housing 1 to cooperate with the push card of the electromagnetic relay; the housing 1 is provided with a first stopping portion 11 and a second stopping portion 12, and the first stopping portion 11 and the second stopping portion 12 are respectively located at two ends of a rotation path of the knob 2 to limit the maximum rotation angle of the knob 2. When the knob 2 is opened, the knob 2 drives the pushing card to move along the direction of the movable reed of the driving electromagnetic relay; when the knob 2 is closed, the knob 2 releases the push card, and the push card resets along with the movable reed of the electromagnetic relay. When the knob 2 is rotated to the open state, the first stopping portion 11 stops the knob 2, and when the knob 2 is rotated to the closed state, the second stopping portion 12 stops the knob 2.

In this embodiment, the knob 2 and the housing 1 are further matched with a self-locking structure, so that the knob 2 is kept in an open state or a closed state. Specifically, the self-locking structure comprises a first self-locking protrusion 13 disposed on the outer surface of the housing 1 and close to the first stopping portion 11, and a second self-locking protrusion 14 disposed on the outer surface of the housing 1 and close to the second stopping portion 12, where the first self-locking protrusion 13 and the second self-locking protrusion 14 are both located on the rotation path of the knob 2, and allow the knob 2 to be driven to rotate. The first and second self- locking protrusions 13 and 14 are preferably round protrusions with small height, but not limited thereto, and in other embodiments, the protrusions may be ribs or the like. The first self-locking protrusion 13 corresponds to an open state of the knob 2, and the second self-locking protrusion 14 corresponds to a closed state of the knob 2.

In this embodiment, the part of the knob 2 located outside the housing 1 is provided with an operation groove 211, and the operation groove 211 is a strip structure, but not limited thereto, so that a tester can conveniently rotate the knob 2 by using a tool in a narrow position.

In this embodiment, the knob 2 specifically includes an operation portion 21, a clamping column 22 disposed at the bottom end of the operation portion 21, and a pushing portion 23 disposed at the bottom end of the clamping column 22, the operation portion 21, the clamping column 22, and the pushing portion 23 are integrally formed, and the cross section of the clamping column 22 is circular. The shell 1 is provided with a mounting hole 15, and the pushing part 23 penetrates through the mounting hole 15 to enter the shell 1 and is matched with a groove arranged on the pushing card to push the pushing card to move. The clamping columns 22 are in clearance fit with the mounting holes 15, so that the knob 2 can be conveniently rotated relative to the shell 1, and the knob 2 can be prevented from being separated from the shell 1. The operation part 21 is positioned outside the housing 1 and can shield the installation gap between the knob 2 and the installation hole 15 to prevent dust from entering. The operation recess 211 is located on the top surface of the operation portion 21.

In this embodiment, the housing 1 is provided with a first indicator and a second indicator for indicating the state of the knob 2, specifically, the first indicator is an "ON" character indicator 16 corresponding to the open state of the knob 2; the second indicator is an "OFF" character 17 corresponding to the OFF state of the knob 2. And a third indicating mark matched with the first indicating mark and a fourth indicating mark matched with the second indicating mark are arranged on the knob 2. The third indicator and the fourth indicator are both arrow indicators, but are not limited thereto. For the sake of distinction, the two arrow marks are named a first arrow mark 212 and a second arrow mark 213, respectively, and the first arrow mark 212 is mated with the "ON" character mark 16, and the second arrow mark 213 is mated with the "OFF" character mark 17. The first arrow mark 212 and the second arrow mark 213 are both located on the top surface of the operation portion 21 of the knob 2, the operation portion 21 has a square structure, and specifically, the contour of the periphery of the operation portion 21 is "convex", but not limited thereto. The first arrow mark 212 points in the longitudinal direction of the operation portion 21, and the second arrow mark 213 points in the width direction of the operation portion 21.

In this embodiment, the knob 2 is located at the top of the housing 1, and the first stopper 11, the second stopper 12, the first self-locking protrusion 13, the second self-locking protrusion 14, the "ON" character mark 16, and the "OFF" character mark 17 are located ON the top surface of the housing 1. The first blocking portion 11 and the second blocking portion 12 are specifically square bumps, but not limited thereto, and in other embodiments, the first blocking portion and the second blocking portion are convex bracts or convex rib structures.

The utility model discloses an electromagnetic relay's manual test switch structure, it has two kinds of states, the first state is as shown in figure 2, at this moment, knob 2 is in the open mode, directional "ON" character sign 16 of first arrow mark 212 ON the operating portion 21 of knob 2, the position that operating portion 21 took first arrow mark 212 is located between first backstop portion 11 and the first auto-lock convex part 13, at this moment, knob 2 can keep at this open mode, avoid knob 2 to take place the malfunction because of non-human factor. The second state is shown in fig. 3, at this time, the knob 2 is in the OFF state, the second arrow mark 213 on the knob 2 points to the "OFF" character mark 17, and the portion of the operating portion 21 with the second arrow mark 213 is located between the second stopper portion 12 and the second self-locking protrusion 14, at this time, the knob 2 can be kept in the OFF state, and the malfunction of the knob 2 due to non-human factors is avoided. When the knob 2 needs to be switched from the open state to the closed state, the operation portion 21 only needs to be rotated counterclockwise until the operation portion 21 is stopped by the second stopping portion 12 and cannot be rotated continuously, at this time, the knob 2 rotates approximately 90 °, and in the rotating process, the bottom surface of the operation portion 21 slides over the top surfaces of the first self-locking protrusion 13 and the second self-locking protrusion 14 in sequence. When the knob 2 needs to be switched from the closed state to the open state, the operation portion 21 only needs to be rotated clockwise until the operation portion 21 is stopped by the first stopping portion 11 and cannot be rotated continuously, at this time, the knob 2 also rotates approximately 90 degrees, and in the rotating process, the bottom surface of the operation portion 21 slides over the top surfaces of the second self-locking protrusion 14 and the first self-locking protrusion 13 in sequence.

Referring to fig. 4-10, an electromagnetic relay according to the present invention includes a magnetic circuit component 3, a contact component, and a push clip 7, wherein an armature 33 of the magnetic circuit component 3 is connected to a movable contact spring 4 of the contact component through the push clip 7, so as to drive the movable contact spring 4 through the push clip 7; still include above embodiment the utility model discloses an electromagnetic relay's manual test switch structure, magnetic circuit component 3, contact assembly, promotion card 7 are located shell 1, the recess 71 clearance fit that sets up on the promotion portion 23 of knob 2 and the promotion card 7.

In this embodiment, the magnetic circuit assembly 3 is horizontal, and includes a coil frame 31 wound with an enameled wire, an iron core penetrating into the coil frame 31, an L-shaped yoke 32, an armature 33, and a pressure spring 34, one side of the yoke 32 is riveted with one end of the iron core, and the tail end of the other side of the yoke 32 is provided with a knife edge; the armature 33 is vertically arranged at the other end of the iron core in a swinging mode through a compression spring 34, the bottom end of the armature 33 is matched with the knife edge of the yoke 32, and the top end of the armature 33 is connected with one end of the push clamp 7. The contact assembly specifically comprises a movable spring 4 provided with a movable contact 41, a normally open static spring 5 and a normally closed static spring 6, wherein the normally open static spring 5 is provided with a normally open static contact 51, and the normally closed static spring 6 is provided with a normally closed static contact 61. The movable spring 4 is positioned between the normally open static spring 5 and the normally closed static spring 6, and the other end of the push clamp 7 is connected and matched with the movable spring 4. The coil frame 31, the movable spring 4, the normally open stationary spring 5 and the normally closed stationary spring 6 are all arranged on a base 8 arranged in the shell 11, and the coil pin 35 on the coil frame 31, the movable spring pin of the movable spring 4, the normally open stationary spring 5 and the stationary spring pin of the normally closed stationary spring 6 all penetrate through the base 8 downwards.

The utility model discloses an electromagnetic relay, its initial condition is shown in fig. 5-7, and at this moment, the movable contact 41 of movable contact spring 4 and the normally closed stationary contact 61 contact of normally closed stationary contact spring 6, knob 2 are in the closed condition, and the promotion portion 23 of knob is clearance fit with the recess 71 that pushes away the card all around.

When the relay is tested abnormally, the knob 2 is firstly rotated clockwise until the knob 2 is stopped by the first stopping portion 11 and cannot be rotated continuously, as shown in fig. 8. In the process, as the knob 2 rotates, the pushing portion 23 of the knob abuts against one side groove wall of the groove 71 on the push card, as shown in fig. 9, and as the knob 2 continues to rotate clockwise, the pushing portion 23 pushes the push card 7 to move axially rightward, so that the push card 7 drives the movable spring piece 4 to move. Next, a resistance between the movable spring pin and the stationary spring pin of the normally open stationary spring 5 is detected by a tool such as a multimeter, and if the resistance is close to zero, it is described that the movable contact 41 of the movable spring 4 and the normally open stationary contact 51 of the normally open stationary spring 5 can be normally contacted, as shown in fig. 10, thereby describing that the relay functions normally; if the resistance is infinite, it is described that the movable contact 41 of the movable spring 4 is disconnected from the normally open stationary contact 51 of the normally open stationary spring 5, and the relay is abnormal. After the detection is finished, the knob 2 is rotated counterclockwise, so that the knob 2 returns to the closed state shown in fig. 5-7, in the process, the pushing part 23 of the knob gradually leaves from one side groove wall of the groove 71 of the push card, thereby releasing the push card 7, and the push card 7 is reset by the elasticity of the movable spring piece 4.

Example two

Referring to fig. 11 to 14, a manual test switch structure of an electromagnetic relay according to the present invention is different from the first embodiment in that: the self-locking structure comprises a self-locking convex bud 24 arranged on the knob, a first positioning groove 18 arranged on the shell 1 and close to the first stopping part 11, and a second positioning groove 19 arranged on the shell 1 and close to the second stopping part 12. When the knob is in an open state, the self-locking protrusions 24 are clamped into the first positioning grooves 18 (as shown in fig. 14), and the knob is allowed to be driven to rotate, namely when the self-locking protrusions 24 are clamped into the first positioning grooves 18, the knob is locked and cannot be accidentally rotated, but the knob can still be driven to rotate, so that the state can be switched. With the knob in the closed position, the self-locking lobes 24 snap into the second detents 19 (as shown in fig. 13) and allow the knob to be driven in rotation. The self-locking bract 24 is specifically positioned on the bottom surface of the operation part 21 of the knob. The self-locking protrusions 24 are spherical protrusions, namely the outer surfaces of the self-locking protrusions 24 are convex arc surfaces, and the shapes of the first positioning grooves 18 and the second positioning grooves 19 are matched with those of the self-locking protrusions. In this manner, the knob 2 is facilitated to be driven to rotate to switch the state.

In other embodiments, the contact assembly includes only a movable spring and a normally open stationary spring, or the contact assembly includes only a movable spring and a normally closed stationary spring.

The above-mentioned embodiment is only used for further explaining the utility model discloses an electromagnetic relay's manual test switch structure and electromagnetic relay, nevertheless the utility model discloses do not confine the embodiment to, all be according to the utility model discloses a technical entity all falls into the protection scope of the technical scheme of the utility model to any simple modification, the equivalent change and the modification of doing above embodiment.

Claims (10)

1. A manual test switch structure of an electromagnetic relay comprises a shell of the electromagnetic relay and a knob which is used for driving a pushing clamp of the electromagnetic relay to move along the direction of a movable reed of the electromagnetic relay, wherein the knob is rotatably arranged on the shell around the axis of the knob, and the part of the knob extends into the shell to be matched with the pushing clamp of the electromagnetic relay; the method is characterized in that: the shell is provided with a first stopping portion and a second stopping portion, and the first stopping portion and the second stopping portion are located at two ends of the rotary path of the knob respectively to limit the maximum rotary angle of the knob.

2. A manual test switch structure of an electromagnetic relay according to claim 1, characterized in that: the knob and the shell are also matched with a self-locking structure, so that the knob is kept in an opening state or a closing state, when the knob is opened, the knob drives the push card to move along the direction of a movable reed of the driving electromagnetic relay, and when the knob is closed, the knob releases the push card.

3. A manual test switch structure of an electromagnetic relay according to claim 2, characterized in that: the self-locking structure comprises a first self-locking convex part arranged on the shell and a second self-locking convex part arranged on the shell, and the first self-locking convex part and the second self-locking convex part are both positioned on a rotation path of the knob and allow the knob to be driven to rotate; the knob is located between the first stopping portion and the first self-locking convex portion in an open state, and the knob is located between the second stopping portion and the second self-locking convex portion in a closed state.

4. A manual test switch structure of an electromagnetic relay according to claim 2, characterized in that: the self-locking structure comprises a self-locking convex bud arranged on the knob, a first positioning groove arranged on the shell and a second positioning groove arranged on the shell; when the knob is in an open state, the self-locking convex bract is clamped into the first positioning groove, and the knob is allowed to be driven to rotate; when the knob is in a closed state, the self-locking convex bracts are clamped into the second positioning grooves, and the knob is allowed to be driven to rotate.

5. A manual test switch structure of an electromagnetic relay according to claim 1, characterized in that: the part of the knob, which is positioned outside the shell, is provided with an operation groove.

6. A manual test switch structure of an electromagnetic relay according to claim 1, characterized in that: the knob comprises an operation part, a clamping column arranged at the bottom end of the operation part and a pushing part arranged at the bottom end of the clamping column, the shell is provided with a mounting hole, and the pushing part penetrates through the mounting hole to enter the shell and is matched with a groove arranged on the pushing clamp; the clamping column is in clearance fit with the mounting hole, and the operating part is positioned outside the shell.

7. A manual test switch structure of an electromagnetic relay according to claim 1, characterized in that: the shell is provided with a first indication mark and a second indication mark which are used for indicating the state of the knob, and the knob is provided with a third indication mark matched with the first indication mark and a fourth indication mark matched with the second indication mark.

8. A manual test switch structure of an electromagnetic relay according to claim 7, characterized in that: the first indication mark is an 'ON' character mark, and the second indication mark is an 'OFF' character mark; the third indication mark and the fourth indication mark are respectively arrow marks.

9. A manual test switch structure of an electromagnetic relay according to claim 1, characterized in that: the knob is positioned on the top of the shell; the first stopping portion and the second stopping portion are located on the top surface of the shell.

10. An armature of the magnetic circuit component is connected with a movable reed of the contact component through the push card so as to drive the movable reed through the push card; the method is characterized in that: the manual test switch structure of the electromagnetic relay in any one of claims 1 to 9, further comprising the magnetic circuit assembly, the contact assembly, and the push card in the housing, wherein the portion of the knob extending into the housing is movably engaged with the push card.

Images