A moving and fixed contact split detection device

Abstract

The present invention provides a moving and fixed contact split detection device, comprising a bottom plate, a first power switch, a vertical plate arranged on the bottom plate, two limit blocks and two first micro switches arranged on the front side of the vertical plate; a vertical arm arranged on the rear side of the bottom plate, a detection platform arranged in the middle of the front side of the vertical arm, a groove arranged on the detection platform, slideways vertically downwardly arranged on the left and right sides of the groove and penetrating the entire detection platform, a slide plate movably penetrated in the slideway, an insertion hole arranged in the length direction of the slide plate, a support spring arranged between the lower end of the slide plate and the top of the limit block, an L-shaped bracket arranged on the outer side of the lower end of the slide plate, a first push rod arranged vertically downwardly on the horizontal plate of the L-shaped bracket, the first push rod corresponding to the button of the first micro switch on the same side thereof, two indicator lights arranged on the left and right sides of the vertical arm on the bottom plate through the bracket, the indicator lights corresponding to the first micro switches on the same side thereof. The present invention has a simple structure, can quickly and accurately realize the split detection of the moving and fixed contacts, ensure that the split is in place, and ensure product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure switch production, and in particular relates to a moving and fixed contact split detection device. Background Art

[0002] During the production process of the pressure switch, the moving contacts installed on the plastic housing need to be split, such as Figure 1 As described, the pressure switch is a columnar structure, with a moving contact and a fixed contact respectively arranged inside, and the moving contact and the fixed contact respectively extend out of the plastic shell to form pins, and the pin has flat protrusions on both sides of one end close to the plastic shell. During the production process, tooling is required to split the flat protrusions on both sides so that they are tightly combined with the plastic shell. How to ensure that the flat protrusions on both sides of the two pins are split in place is the problem we are studying. Summary of the invention

[0003] The invention provides a moving and fixed contact split detection device, which is used for detecting whether the moving and fixed contacts of a pressure switch are split in place.

[0004] The technical solution adopted by the present invention is: a moving and fixed contact split detection device, including a bottom plate, a first power switch, a vertical plate is arranged on the bottom plate, two limit blocks are arranged side by side on the left and right sides of the front side of the vertical plate, and two first micro switches are arranged on the left and right sides of the front side of the vertical plate; a vertical arm is arranged on the rear side of the bottom plate, a detection platform is arranged in the middle of the front side of the vertical arm, a groove for accommodating a pressure switch is arranged on the detection platform, and slideways that penetrate the entire detection platform are arranged vertically downward on the left and right sides of the groove, and a slide plate is movably inserted in the slideway, the top of the slide plate is higher than the upper surface of the detection platform, and in the length direction of the slide plate An insertion hole is provided, and the lower end of the skateboard extends out of the detection platform. A support spring is provided between the lower end of the skateboard and the top of the limit block. An L-shaped bracket is provided on the outer side of the lower end of the skateboard. A first push rod is provided vertically downward on the horizontal plate of the L-shaped bracket, and the first push rod corresponds to the button of the first micro switch on the same side thereof. Two indicator lights are arranged on the left and right sides of the vertical arm on the bottom plate through the bracket, and the normally open terminal of the first micro switch is connected to the indicator light on the same side thereof. One end of the first power switch is respectively connected to the two indicator lights, and the other end is respectively connected to the common terminal of the two first micro switches.

[0005] Preferably, it also includes a pressing mechanism, which includes a cylinder, a second microswitch and a second power switch. The cylinder is vertically arranged on the upper front side of the vertical arm, and its push plate is downward. A pressing plate is arranged in front of the cylinder push plate, and the pressing plate extends outward to the outside of the vertical arm. A second push rod is vertically arranged downward at the outer extension end of the pressing plate. The second microswitch is arranged on one side of the detection platform and on the same side as the outer extension end of the pressing plate. The button of the second microswitch corresponds to the second push rod, and the normally closed terminal of the second microswitch is connected to the cylinder. One end of the second power switch is connected to the cylinder, and the other end is connected to the common terminal of the second microswitch.

[0006] Preferably, a clearance groove is provided on the top of the slide along its width direction and runs through the entire slide, the clearance groove is matched with the front and rear side bosses of the pressure switch pin, and the bottom of the clearance groove is flush with the upper surface of the detection platform.

[0007] Preferably, an I-shaped guide column is arranged at the bottom of the detection platform, and the slide plate is arranged on both sides of the I-shaped guide column and extends downwardly from the I-shaped guide column.

[0008] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a simple structure, can quickly and accurately detect the splitting of the moving and fixed contacts, ensures that the splitting is in place, and guarantees product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Schematic diagram of the structure of this pressure switch.

[0010] Figure 2 It is a structural schematic diagram of the present invention.

[0011] Figure 3 This is a schematic diagram of the front structure of the detection platform.

[0012] Figure 4 This is a schematic diagram of the reverse structure of the detection platform.

[0013] In the figure: 100, pressure switch; 101, pin; 102, boss; 103, flat protrusion; 104, fork point; 1, bottom plate; 2, first power switch; 3, vertical plate; 4, limit block; 5, first micro switch; 6, vertical arm; 7, detection platform; 8, support spring; 9, L-shaped bracket; 10, first push rod; 11, indicator light; 12, I-shaped guide column; 13, cylinder; 14, second micro switch; 15, second power switch; 16, pressure plate; 17, second push rod; 71, groove; 72, slide plate; 73, insertion hole; 74, inverted L-shaped clearance groove; 75, clearance groove. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments. The accompanying drawings are only for exemplary description and are only schematic diagrams rather than physical drawings, and cannot be understood as limiting the present patent; it is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0015] The movable and fixed contact split detection device of the present invention is used to detect whether the split is in place. Figure 1 The pressure switch 100 has a protrusion 102 formed integrally with the plastic shell at the front and rear sides of the pin 101 near the end of the plastic shell, and a flat protrusion 103 formed integrally with the pin on the left and right sides. After the flat protrusion is split, it will tilt outward to form a split point 104. Since the split fork knife is two opposite triangles, the split depths are different, and the split point tilts outward at different angles, resulting in different horizontal distances between the split point and the pin. The detection device detects whether the split is in place based on the horizontal distance between the two split points.

[0016] Specifically, it comprises a bottom plate 1 and a first power switch 2. A vertical plate 3 is arranged on the bottom plate 1. Two limit blocks 4 are arranged side by side on the left and right sides of the front side of the vertical plate 3. Two first micro switches 5 are arranged on the left and right sides of the front side of the vertical plate 3. The two first micro switches are arranged symmetrically, and the buttons are located on the top thereof. A vertical arm 6 is arranged on the rear side of the bottom plate 1. A detection platform 7 is arranged on the front side of the vertical arm 6. A groove 71 for accommodating a pressure switch is provided on the detection platform 7. Slideways that penetrate the entire detection platform are vertically provided on the left and right sides of the groove downward. A slide plate 72 is movably provided in the slideway. The top of the slide plate is higher than the upper surface of the detection platform. An insertion hole 73 is provided in the length direction of the slide plate 72. The insertion hole is a rectangular through hole adapted to the pin. The length of the insertion hole is greater than the width of the pin body and is slightly smaller than the outer horizontal distance of the left and right fork points after the fork is successfully forked, so that when the pin is inserted into the insertion hole of the slide plate, the fork point is located outside the insertion hole, and the pin is clamped by the fork points on both sides to prevent the pressure switch from falling.

[0017] The lower end of the slide plate 72 extends out of the detection platform, and a support spring 8 is arranged between the lower end of the slide plate 72 and the top of the limit block 4. Under the action of the support spring, the slide plate is movably inserted into the slide groove, and an L-shaped bracket 9 is arranged on the outer side of the lower end of the slide plate 72. In order to facilitate the arrangement of the L-shaped bracket, an inverted L-shaped yielding groove 74 is opened on the outer side of the lower end of the slide plate. A first push rod 10 is vertically downwardly arranged on the horizontal plate of the L-shaped bracket 9, and the first push rod 10 corresponds to the button of the first micro switch 5 on the same side thereof. Two indicator lights 11 are arranged on the left and right sides of the vertical arm on the bottom plate through the bracket, and the indicator lights 11 correspond to the first micro switch 5 on the same side thereof. Specifically, the normally open terminal of the first micro switch 5 is connected to the indicator light 11 on the same side thereof, and one end of the first power switch 2 (that is, the positive or negative pole of the load of the first power switch) is respectively connected to the two indicator lights, and the other end (that is, the negative or positive pole of the load of the first power switch) is respectively connected to the common terminal of the two first micro switches.

[0018] In this embodiment, the micro switch adopts the existing technology product. The micro switch is a double switch with three pins, namely a common terminal, a normally open terminal, and a normally closed terminal. A transmission element (pin, button, lever, roller, etc.) is provided on the housing of the micro switch. The common terminal extends into the housing and has a common end. The normally open terminal extends into the housing and has a normally open contact. The normally closed terminal extends into the housing and has a normally closed contact. Under normal circumstances, the common end of the common terminal is connected to one end of the moving spring, and the contact at the other end of the moving spring contacts the normally closed contact and is separated from the normally open contact. At this time, the normally closed terminal circuit is in a connected state and the normally open terminal is in a disconnected state. When the external mechanical force acts on the moving spring through the transmission element (pin, button, lever, roller, etc.), the contact at the end of the moving spring can be separated from the normally closed contact and contacted with the normally open contact, thereby disconnecting the normally closed terminal circuit and connecting the normally open terminal circuit.

[0019] Since the normally open terminal of the micro switch is not in contact with its common terminal, the entire circuit is in a disconnected state. Start the first power switch, and the indicator light is off. Place the two pins of the pressure switch into the insertion holes of the skateboard. The forked points on both sides of the pins will jam the pins to prevent the entire pressure switch from falling. Then press the pressure switch downward to make the skateboard fall, driving the first push rod on the outer side of the slide to move downward and press the button of the first micro switch to close the circuit of the first micro switch, thereby lighting up the indicator light. At this time, the fork is assumed to be successful. If the fork is not in place, the fork point is relatively close to the middle section, that is, the outer horizontal distance between the two fork points is smaller than the outer horizontal distance when the fork is successful. After the two pins of the pressure switch are placed in the insertion hole of the skateboard, the two fork points of the pins will extend into the insertion hole, and the inner height of the groove is constant, that is, the pressure switch moves downward a certain distance. When the fork point enters the insertion hole, compared with the case where the fork point is stuck at both ends of the insertion hole, the former drives the skateboard to move downward a smaller distance than the latter. Therefore, when the fork is not in place, even if you press downward, the button of the first micro switch cannot be pressed to light up the indicator light due to insufficient movement of the skateboard.

[0020] At the same time, a clearance groove 75 is provided on the top of the slide plate 72 along its width direction, which runs through the entire slide plate. The clearance groove is adapted to the front and rear side bosses of the pressure switch pin. Specifically, the depth of the clearance groove is equal to or slightly greater than the height of the front and rear side bosses of the pressure switch pin, the front and rear width of the clearance groove is equal to the length of the boss, the left and right widths of the clearance grooves on both sides of the insertion hole are equal to or slightly greater than the width of the boss, and the bottom of the clearance groove is flush with the upper surface of the detection platform. This design mainly takes into account that the front and rear sides of the pressure switch pin are provided with bosses 102 integrally formed with the plastic shell. When the fork is not in place, after the two pins of the pressure switch are placed in the insertion hole of the slide plate, the two fork points of the pins will extend into the insertion hole. The clearance groove is used to make way for the boss, so as to ensure that the fork points on both sides of the pressure pin itself completely enter the insertion hole, thereby ensuring that the moving distance of the slide plate is less than the moving distance when the fork is successful, so that the detection result is valid. Of course, if the front and rear sides of the pressure switch pin are not provided with bosses integrally formed with the plastic housing, it is not necessary to provide the clearance groove.

[0021] In addition, in order to ensure the stability of the slide when moving, an I-shaped guide column 12 is set at the bottom of the detection platform. The I-shaped guide column corresponds to the position of the groove of the detection platform. The slide is set on both sides of the I-shaped guide column and extends downward from the I-shaped guide column.

[0022] The pressing of the above-mentioned pressure switch can be operated manually. However, considering the manual operation process, it is easy to cause fatigue. Therefore, it also includes a pressing mechanism, which includes a cylinder 13, a second micro switch 14 and a second power switch 15. The cylinder 13 is vertically arranged on the upper front side of the vertical arm, and its push plate is downward. A pressing plate 16 is arranged on the front side of the push plate of the cylinder. The pressing plate extends outward to the outside of the vertical plate. A second push rod 17 is vertically arranged downward at the outer extension end of the pressing plate. The second micro switch 14 is arranged on one side of the detection platform and is arranged on the same side as the outer extension end of the pressing plate. The button of the second micro switch corresponds to the second push rod. The normally closed terminal of the second micro switch is connected to the cylinder, and one end of the second power switch (i.e., the positive or negative pole of the load of the second power switch) is connected to the cylinder, and the other end (i.e., the negative or positive pole of the load of the second power switch) is connected to the common terminal of the second micro switch. Since the normally closed terminal of the micro switch is in contact with its common terminal, the entire circuit is in contact, the second power switch is started, the cylinder is actuated, the pressure plate moves downward until the second push rod presses the button of the second micro switch, disconnecting the circuit of the second micro switch. At this time, the cylinder stops pressing downward and contracts to reset.

[0023] The working process of the moving and fixed contact split detection device is as follows: start the first power switch, the indicator light is off at this time, place the two pins of the pressure switch into the insertion hole of the slide plate, start the second power switch, the cylinder moves, the pressure plate moves downward to press the pressure switch to move it downward, if both indicator lights are on, it means that both pins are split in place, if one or two indicator lights are not on, it means that the corresponding pins are not split in place. When the pressure plate is pressed into place, the second push rod presses the second micro switch button, disconnecting the circuit of the second micro switch, and the cylinder retracts and resets. Under the action of the support spring, the first push rod releases the button, so that the indicator light goes out again at the moment of lighting.

Claims

1. A moving and fixed contact split detection device, characterized in that: It includes a bottom plate and a first power switch. A vertical plate is arranged on the bottom plate. Two limit blocks are arranged side by side on the left and right sides of the front middle of the vertical plate. Two first micro switches are arranged on the left and right sides of the front side of the vertical plate. A vertical arm is arranged on the rear side of the bottom plate. A detection platform is arranged in the middle of the front side of the vertical arm. A groove for accommodating a pressure switch is arranged on the detection platform. Slideways that penetrate the entire detection platform are arranged vertically downward on the left and right sides of the groove. A slide plate is movably inserted in the slideway. The top of the slide plate is higher than the upper surface of the detection platform. An insertion hole is arranged in the length direction of the slide plate. The lower end of the slide plate A detection platform is provided for extending the slide, a supporting spring is provided between the lower end of the slide and the top of the limit block, an L-shaped bracket is provided on the outer side of the lower end of the slide, a first push rod is provided vertically downward on the horizontal plate of the L-shaped bracket, the first push rod corresponds to the button of the first micro switch on the same side thereof, two indicator lights are arranged on the left and right sides of the vertical arm on the bottom plate through the bracket, the normally open terminal of the first micro switch is connected to the indicator light on the same side thereof, one end of the first power switch is respectively connected to the two indicator lights, and the other end is respectively connected to the common terminal of the two first micro switches.

2. The moving and fixed contact split detection device according to claim 1, characterized in that: It also includes a pressing mechanism, which includes a cylinder, a second microswitch and a second power switch. The cylinder is vertically arranged on the upper front side of the vertical arm, and its push plate is downward. A pressing plate is arranged in front of the cylinder push plate, and the pressing plate extends outward to the outside of the vertical arm. A second push rod is vertically arranged downward at the outer extension end of the pressing plate. The second microswitch is arranged on one side of the detection platform and on the same side as the outer extension end of the pressing plate. The button of the second microswitch corresponds to the second push rod, and the normally closed terminal of the second microswitch is connected to the cylinder. One end of the second power switch is connected to the cylinder, and the other end is connected to the common terminal of the second microswitch.

3. The moving and fixed contact split detection device according to claim 1, characterized in that: A clearance groove is provided on the top of the slide plate along its width direction and runs through the entire slide plate. The clearance groove is matched with the front and rear side bosses of the pressure switch pin, and the bottom of the clearance groove is flush with the upper surface of the detection platform.

4. The moving and fixed contact split detection device according to claim 1, characterized in that: An I-shaped guide column is arranged at the bottom of the detection platform, and the slide plate is arranged on both sides of the I-shaped guide column and extends downward from the I-shaped guide column.

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