An overload protector and an installation method thereof

Abstract

The present invention discloses an overload protector and an installation method thereof, which comprises a protective shell, a pin 1 and a pin 2, a push-button overload protection switch is arranged on the top of the protective shell, a metal spring is arranged in the protective shell, one end of the metal spring is arranged with a connection block, the bottom of the connection block is located in the protective shell and is provided with a slot matching the metal spring, one end of the metal spring is connected with the connection block through the slot, the top of the connection block penetrates the protective shell and is connected with the push-button overload protection switch, the other end of the metal spring is fixedly connected with the pin 1, one end of the pin 1 is fixedly connected with the metal spring, the other end of the pin 1 penetrates the protective shell and is located at the bottom of the protective shell, a moving contact is arranged on the metal spring, one end of the pin 2 is located in the protective shell and is provided with a static contact corresponding to the moving contact, and the other end of the pin 2 penetrates the protective shell and is located at the bottom of the protective shell. The beneficial effect of the present invention is that the circuit can be automatically disconnected.

Description

Technical Field

[0001] The present invention relates to the technical field of switches, and in particular to an overload protector and an installation method thereof. Background Art

[0002] With the continuous development of society and the continuous improvement of people's quality of life, various electrical equipment have appeared in life. With the continuous aging of household appliances and circuits, or improper use of appliances, safety accidents such as circuit overload or short circuit are prone to occur. If an overload protector is added between the appliance and the socket of the house circuit and its installation method, the probability of safety accidents will be effectively reduced.

[0003] Especially when the electrical appliances commonly used in our family life are overloaded, when the household appliances encounter abnormal conditions during use, resulting in excessive current or excessive temperature, the existing plug devices cannot automatically disconnect the circuit because they have no automatic power-off function, which can easily cause damage to the appliances or even fire, bringing extremely serious consequences. Summary of the invention

[0004] The present invention aims to overcome the deficiency in the prior art that the circuit cannot be automatically disconnected when an abnormal situation occurs during the use of an electrical appliance, and provides an overload protector capable of automatically disconnecting the circuit and an installation method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An overload protector comprises a protective shell, a pin 1 and a pin 2, wherein a push-button overload protection switch is arranged on the top of the protective shell, a metal spring is arranged in the protective shell, one end of the metal spring is arranged with a connecting block, the bottom of the connecting block is located in the protective shell and is provided with a slot matching the metal spring, one end of the metal spring is connected to the connecting block through the slot, the top of the connecting block penetrates the protective shell and is connected to the push-button overload protection switch, the other end of the metal spring is fixedly connected to the pin 1, one end of the pin 1 is fixedly connected to the metal spring, the other end of the pin 1 penetrates the protective shell and is located at the bottom of the protective shell, a moving contact is arranged on the metal spring, one end of the pin 2 is located in the protective shell and is provided with a static contact corresponding to the moving contact, and the other end of the pin 2 penetrates the protective shell and is located at the bottom of the protective shell.

[0007] A push-button overload protection switch is provided on the top of the protective shell, and a metal spring is provided in the protective shell. A connecting block is provided at one end of the metal spring, and the bottom of the connecting block is located in the protective shell and is provided with a slot matching the metal spring. One end of the metal spring is connected to the connecting block through the slot, and the top of the connecting block penetrates the protective shell and is connected to the push-button overload protection switch. The other end of the metal spring is fixedly connected to pin one, and one end of pin one is fixedly connected to the metal spring, and the other end of pin one penetrates the protective shell and is located at the bottom of the protective shell. A moving contact is provided on the metal spring, and one end of pin two is located in the protective shell and is provided with a static contact corresponding to the moving contact, and the other end of pin two penetrates the protective shell and is located at the bottom of the protective shell. Pin one is electrically connected to an external power source, and pin two is electrically connected to a device; when the circuit is connected, the moving contact on the metal spring and the stationary contact on pin two are in contact, and the current of the power supply flows into the device through pin one, the metal spring and pin two in sequence; the user can control the connection or disconnection of the circuit through a push-button overload protection switch, and the push-button overload protection switch drives the metal spring to move through the connecting block, so that the moving contact on the metal spring is in contact with or separated from the stationary contact on pin two, which is convenient to control and greatly improves the safety performance; in addition, if an overload occurs, the metal spring is deformed, so that the moving contact on the metal spring is automatically separated from the stationary contact on pin two, so that the current is disconnected to protect the device from damage, thereby achieving the purpose of automatically disconnecting the circuit.

[0008] Preferably, the push-button overload protection switch comprises a limit cylinder, a base plate, a locking piece and a pressure rod. The bottom of the limit cylinder is detachably connected to the top of the protective shell. The base plate, the locking piece and the pressure rod are all circular in shape and are all located in the limit cylinder. The interior of the locking piece and the interior of the pressure rod are hollow. The top of the locking piece is located in the pressure rod. A plurality of guide blocks are provided at the bottom of the locking piece. The plurality of guide blocks are evenly distributed along the circumference of the locking piece and are located outside the locking piece. A sliding groove is formed between every two adjacent guide blocks. The top of the guide block is close to the pressure rod and is provided with an N-shaped oblique guide groove. The bottom of the guide block is away from the pressure rod. The top of the pressure rod is sealed and passes through the top of the limit cylinder. A plurality of arc plates corresponding to the guide blocks are provided at the bottom of the pressure rod. A sliding groove is formed between every two adjacent arc plates. Corresponding to the sliding groove 2, a plurality of sliding bars matching the sliding groove 1 and the sliding groove 2 are arranged in the limiting cylinder, the top of the sliding bar is fixedly connected to the top of the limiting cylinder, and the bottom of the sliding bar is provided with a guide inclined surface matching the N-type inclined guide groove, one of which is fixedly connected to the connecting block, and the arc plate is provided with guide teeth matching the N-type inclined guide groove, the pressure rod is engaged with the N-type inclined guide groove through the guide teeth on the arc plate and is connected to the locking member, the bottom of the locking member is rotatably connected to the bottom plate, a spring is arranged in the locking member, the top of the locking member is sealed, one end of the spring is in contact with the top of the locking member, and the other end of the spring passes through the bottom of the locking member and is in contact with the top of the bottom plate, the bottom of the bottom plate is in contact with the top of the protective shell, and the bottom of the bottom plate is detachably connected to the bottom of the limiting cylinder. This design is beneficial for the user to apply a downward pressure to the pressure rod, so that the guide teeth on the pressure rod mesh with the N-type inclined guide groove on the locking piece for transmission, and the locking piece rotates, causing the guide teeth to produce a vertical displacement in the N-type inclined guide groove, thereby causing the pressure rod to drive the connecting block to produce a vertical displacement, and the connecting block drives the moving contact on the metal spring to contact or separate from the static contact on pin two, thereby realizing manual control of the circuit connection or disconnection. The design is reasonable and easy to operate.

[0009] Preferably, two L-shaped blocks are arranged on the side of the bottom plate, and the two L-shaped blocks are symmetrically distributed front and back with the bottom plate as the center. One end of the L-shaped block is fixedly connected to the side of the bottom plate, and the other end of the L-shaped block is provided with a flange, and the flange and the L-shaped block form a Z-shaped structure. Mounting blocks are arranged on the front and back sides outside the limiting cylinder, and the mounting block is located at the bottom of the limiting cylinder. The mounting block is provided with a through hole matching the L-shaped block, and a mounting plate matching the flange is arranged in the through hole. The bottom plate is mounted on the mounting block of the limiting cylinder through the flange on the L-shaped block and the mounting plate matching the mounting plate. Blocks are arranged on the left and right sides outside the limiting cylinder, and the shape of the block is a cube. The two blocks are symmetrically distributed and parallel to each other, and the block is located at the bottom of the limiting cylinder. The limiting cylinder is detachably connected to the top of the protective shell through the block. The bottom plate slides into the through hole through the L-shaped block, and the flange on the L-shaped block is installed on the mounting plate in the through hole, which is conducive to the key-type overload protection switch being installed on the protective shell in an integral form through the block, which is convenient for installation and disassembly.

[0010] Preferably, a connecting cross bar is provided on the outer wall of the pressure rod, one end of the connecting cross bar is fixedly connected to one of the arc-shaped plates, the other end of the connecting cross bar is provided with an L-shaped rod, a U-shaped groove is provided on the top of the connecting block, one end of the L-shaped rod is fixedly connected to the connecting cross bar, the other end of the L-shaped rod is located in the U-shaped groove and is detachably connected to the connecting block through the U-shaped groove, a sliding groove matching the connecting cross bar is provided on the limiting cylinder, and the pressure rod is matched with the connecting cross bar and the sliding groove to slide up and down with the limiting cylinder. When the user presses the pressure rod, the pressure rod drives the connecting block to generate vertical displacement through the L-shaped rod on the connecting cross bar, and the connecting block drives the moving contact on the metal spring to contact or separate with the static contact on the second pin, so as to realize the artificial control of the connection or disconnection of the circuit.

[0011] Preferably, the protective shell includes an upper shell and a lower shell, the upper shell is detachably connected to the lower shell, two positioning blocks are provided on the upper shell, the positioning blocks are in the shape of long strips, the two positioning blocks are symmetrically distributed and parallel to each other, the positioning blocks are provided with a mounting groove matching the card block, one side of the card block is fixedly connected to the limit cylinder, the other side of the card block is provided with a buckle, and the mounting groove is provided with a card slot matching the buckle, the L-shaped rod is located between one of the positioning blocks and the connecting block, and the top of the connecting block passes through the upper shell and is detachably connected to the L-shaped rod through the U-shaped groove. The push-button overload protection switch slides into the mounting groove on the positioning block through the card block in an integral form, and finally the installation of the push-button overload protection switch is completed when the buckle slides into the card slot, thereby improving the position stability of the push-button overload protection switch.

[0012] Preferably, the shape of pin 1 and pin 2 are both L-shaped, one side of pin 1 is fixedly connected to the metal spring, the other side of pin 1 passes through the bottom of the lower shell and is provided with a connecting piece, pin 2 is located on the side of the metal spring, one end of one side of pin 2 is fixedly connected to the static contact, and the other end passes through the side wall of the lower shell and is fixedly connected to the other side. Pin 1 passes through one side of the bottom of the lower shell to connect to the external power supply through the connecting piece, and the moving contact on the metal spring contacts the static contact to conduct the circuit with pin 2, pin 2 passes through one side of the bottom of the lower shell and is electrically connected to the device, thereby realizing the function of powering the device; when the circuit is overloaded and the metal spring is deformed, the moving contact on the metal spring separates from the static contact on pin 2, and the circuit can be automatically disconnected in time, which greatly improves the timeliness and sensitivity of power off and avoids danger.

[0013] Preferably, a convex plate is provided in the lower shell, the convex plate is fixedly connected to one side of the lower shell, the convex plate and the bottom of the lower shell form a pin groove 1, one side of the pin 1 fixedly connected to the metal spring is located in the pin groove 1, and the bottom of the lower shell is provided with a pin groove 2 matching the other side of the pin 1, and the pin groove 2 is located on the side of the lower shell. One side of the pin 1 fixedly connected to the metal spring is inserted into the pin groove 1 or pulled out from the pin groove 1 through the side of the lower shell, and the other side of the pin 1 is installed in the pin groove 2. This design is conducive to the installation and removal of the pin 1.

[0014] Preferably, a mounting protrusion is provided in the lower shell body, and the mounting protrusion is fixedly connected to the other side of the lower shell body, the mounting protrusion is located at the top of the lower shell body, the mounting protrusion and the bottom of the lower shell body are parallel to each other, the top of the mounting protrusion contacts the inner side wall of the upper shell body, the bottom of the mounting protrusion is provided with an upper limit block and a pin groove three, the upper limit block is located on the side of the mounting protrusion close to the connecting block, the bottom of the lower shell body is provided with a lower limit block corresponding to the upper limit block, the metal spring is located between the upper limit block and the lower limit block, the pin groove three is located at the center position of the mounting protrusion, the top side of the pin groove three is away from the metal spring, the bottom side of the pin groove three is close to the metal spring, the bottom side of the pin groove three is connected with the interior of the lower shell body, one side of the pin two where the static contact is located is installed in the pin groove three, the static contact is located on the bottom side of the pin groove three, the outer side wall of the lower shell body is provided with a pin groove four matching the other side of the pin two, and the side of the mounting protrusion away from the connecting block is fixedly connected to the protruding plate. One side of pin 2 where the static contact is located is inserted into pin slot 3 through the outer wall of the lower shell, and the other side of pin 2 is installed in pin slot 4. This design facilitates the installation and disassembly of pin 2; the upper limit block and the lower limit block can effectively prevent the metal spring from excessive deformation and affecting its service life.

[0015] Preferably, one edge of pin 1 passing through the bottom of the lower shell is located between pin slot 2 and one side of the upper shell, and a positioning plate matching pin slot 4 is provided on the other side of the upper shell, and one edge of pin 2 passing through the side wall of the lower shell is located between pin slot 4 and the positioning plate. One edge of pin 1 fixedly connected to the metal spring is inserted into or pulled out of pin slot 1 through the side of the lower shell, and the other edge of pin 1 is installed in pin slot 2 and fixed by the side limit of the upper shell, which is convenient for the installation and removal of pin 1; one edge of pin 2 where the static contact is located is inserted into pin slot 3 through the outer side wall of the lower shell, and the other edge of pin 2 is installed in pin slot 4 and fixed by the positioning plate, which is convenient for the installation and removal of pin 2.

[0016] Preferably, the metal spring piece is in an E-shape, and is formed integrally by a substrate and side piece 1, side piece 2 and side piece 3 which are perpendicular to the substrate, side piece 2 is located between side piece 1 and side piece 3, the moving contact is located on side piece 2, the length of side piece 2 is smaller than the length of side piece 1 and the length of side piece 3, two welding points are arranged on an edge of pin 1 located in pin groove 1, the distance between the two welding points is smaller than the distance between side piece 1 and side piece 3, one end of side piece 1 is fixedly connected to the substrate, the other end of side piece 1 is fixedly connected to pin 1 through one of the welding points, one end of side piece 3 is fixedly connected to the substrate, and the other end of side piece 3 is fixedly connected to pin 1 through another welding point. This design makes side piece 1 and side piece 3 approach each other through the corresponding welding points and the ends of pin 1 that are connected, so that side piece 2 drives the moving contact to convex or concave when the circuit is overloaded or the temperature is too high, thereby realizing the contact or separation between the moving contact and the static contact, and the working principle is simple and the response is fast and sensitive.

[0017] The present invention also provides a method for installing an overload protector, which is characterized by comprising the following steps:

[0018] Step 1: slide one end of the metal spring fixedly connected to one edge of the pin 1 from the side of the lower shell into the pin groove 1 until the other edge of the pin 1 is located in the pin groove 2, and at the same time, the other end of the metal spring 2 slides into the slot at the bottom of the connecting block;

[0019] Step 2: Slide one edge of the pin 2 where the static contact is located into the pin groove 3 from the other side of the lower housing until the other edge of the pin 2 is located in the pin groove 4. At this time, the static contact is located at a position corresponding to the moving contact.

[0020] Step 3, install the upper shell on the lower shell so that one side of the upper shell clamps the pin 1, and at the same time, the positioning plate on the other side of the upper shell is located at a position corresponding to the pin groove 4, clamping the pin 2;

[0021] Step 4, assemble the push-button overload protection switch: first install the spring in the locking piece, and the locking piece is installed on the bottom plate. At this time, one end of the spring is placed in the center of the bottom plate, and the other end of the spring is located in the locking piece and contacts the top of the locking piece. Then, assemble the guide tooth on the bottom of the pressure rod on the N-shaped inclined guide groove of the locking piece. Finally, install the limit cylinder from top to bottom, so that the connecting cross bar slides into the slide groove, and the L-shaped block on the bottom plate passes through the through hole on the mounting block at the bottom of the limit cylinder, and the flange on the L-shaped block is installed on the mounting plate;

[0022] Step 5. Install the push-button overload protection switch on the upper shell: the blocks on both sides of the bottom of the limit cylinder slide into the installation grooves on the corresponding positioning blocks along the sides of the upper shell. At the same time, the L-shaped rod slides into the U-shaped groove on the top of the connecting block until the buckle on the block slides into the slot and is fixed.

[0023] When the circuit is overloaded, not only can the metal spring deform to automatically disconnect the circuit, but the circuit can also be connected or disconnected by manually controlling the push-button overload protection switch, which greatly improves the safety performance of the circuit; at the same time, it is convenient for the installation and removal of the protector.

[0024] The beneficial effects of the present invention are: the circuit can be automatically disconnected to protect the equipment from damage; at the same time, the circuit can be connected or disconnected by manually controlling the push-button overload protection switch, which greatly improves the safety performance of the circuit; and the installation and disassembly are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 yes Figure 1 Rear view of

[0027] Figure 3 It is a schematic diagram of the structure of the present invention after the upper shell is removed;

[0028] Figure 4 yes Figure 1 Sectional view of AA in the middle;

[0029] Figure 5 It is a schematic diagram of the structure of the present invention after the limiting cylinder is removed;

[0030] Figure 6 yes Figure 1 Cross-sectional view of the middle BB;

[0031] Figure 7 It is a schematic diagram of the structure of a metal shrapnel.

[0032] In the figure: 1. Protective housing, 2. Pin 1, 3. Pin 2, 4. Push-button overload protection switch, 5. Metal spring, 6. Connecting block, 7. Slot, 8. Moving contact, 9. Static contact, 10. Limiting cylinder, 11. Bottom plate, 12. Locking piece, 13. Press rod, 14. Guide block, 15. Sliding groove 1, 16. N-type oblique guide groove, 17. Arc plate, 18. Sliding groove 2, 19. Sliding bar, 20. Guide tooth, 21. Spring, 22. L-shaped block, 23. Flanging, 24. Mounting block, 25. Through hole, 26. Mounting plate, 27. Block, 28. Connecting cross bar, 29. L-shaped bar, 30. U-shaped groove, 31. slide groove, 32. upper shell, 33. lower shell, 34. positioning block, 35. mounting groove, 36. buckle, 37. slot, 38. convex plate, 39. pin groove one, 40. pin groove two, 41. convex block, 42. upper limit block, 43. pin groove three, 44. lower limit block, 45. pin groove four, 46. positioning plate, 47. base plate, 48. side plate one, 49. side plate two, 50. side plate three, 51. welding point, 52. connecting plate. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] like Figure 1 and Figure 2 In the embodiment described, an overload protector comprises a protective housing 1, a pin 1 2 and a pin 2 3. A push-button overload protection switch 4 is provided on the top of the protective housing 1. Figure 3 As shown, a metal shrapnel 5 is provided in the protective shell 1, and a connecting block 6 is provided at one end of the metal shrapnel 5. The bottom of the connecting block 6 is located in the protective shell 1 and is provided with a slot 7 matching the metal shrapnel 5. One end of the metal shrapnel 5 is connected to the connecting block 6 through the slot 7, and the top of the connecting block 6 penetrates the protective shell 1 and is connected to the push-button overload protection switch 4. The other end of the metal shrapnel 5 is fixedly connected to pin 1 2, and one end of pin 1 2 is fixedly connected to the metal shrapnel 5, and the other end of pin 1 2 penetrates the protective shell 1 and is located at the bottom of the protective shell 1. A moving contact 8 is provided on the metal shrapnel 5, and one end of pin 2 3 is located in the protective shell 1 and is provided with a static contact 9 corresponding to the moving contact 8, and the other end of pin 2 3 penetrates the protective shell 1 and is located at the bottom of the protective shell 1.

[0035] like Figure 4 As shown, the push-button overload protection switch 4 includes a limit cylinder 10, a bottom plate 11, a locking member 12 and a pressure rod 13. The bottom of the limit cylinder 10 is detachably connected to the top of the protective shell 1. The bottom plate 11, the locking member 12 and the pressure rod 13 are all circular in shape and are all located in the limit cylinder 10. The interior of the locking member 12 and the interior of the pressure rod 13 are hollow, and the top of the locking member 12 is located in the pressure rod 13. Figure 5As shown, a plurality of guide blocks 14 are provided at the bottom of the locking member 12, and the plurality of guide blocks 14 are evenly distributed along the circumference of the locking member 12 and are located outside the locking member 12, a sliding groove 15 is formed between each two adjacent guide blocks 14, the top of the guide block 14 is close to the pressure rod 13 and is provided with an N-shaped inclined guide groove 16, the bottom of the guide block 14 is away from the pressure rod 13, the top of the pressure rod 13 is sealed and passes through the top of the limiting cylinder 10, and a plurality of arc plates 17 corresponding to the guide blocks 14 are provided at the bottom of the pressure rod 13, and a sliding groove 2 18 corresponding to the sliding groove 15 is formed between each two adjacent arc plates 17, as shown in FIG. Figure 6 As shown, the limiting cylinder 10 is provided with a plurality of sliding bars 19 respectively matching the sliding groove 15 and the sliding groove 2 18, the top of the sliding bar 19 is fixedly connected to the top of the limiting cylinder 10, and the bottom of the sliding bar 19 is provided with a guide inclined surface matching the N-shaped inclined guide groove 16, wherein an arc plate 17 is fixedly connected to the connecting block 6, as shown in FIG. Figure 5 As shown, the arc plate 17 is provided with a guide tooth 20 matching the N-shaped inclined guide groove 16, and the pressure rod 13 is connected to the locking member 12 through the guide tooth 20 on the arc plate 17 meshing with the N-shaped inclined guide groove 16, as shown in FIG. Figure 4 As shown, the bottom of the locking member 12 is rotatably connected to the base plate 11, a spring 21 is provided inside the locking member 12, the top of the locking member 12 is sealed, one end of the spring 21 is in contact with the top of the locking member 12, the other end of the spring 21 passes through the bottom of the locking member 12 and is in contact with the top of the base plate 11, the bottom of the base plate 11 is in contact with the top of the protective shell 1, and the base plate 11 is detachably connected to the bottom of the limiting cylinder 10.

[0036] like Figure 4 and Figure 5 As shown, two L-shaped blocks 22 are provided on the side of the bottom plate 11. The two L-shaped blocks 22 are symmetrically distributed front and back with the bottom plate 11 as the center. One end of the L-shaped block 22 is fixedly connected to the side of the bottom plate 11, and the other end of the L-shaped block 22 is provided with a flange 23. The flange 23 and the L-shaped block 22 form a Z-shaped structure, as shown in FIG. Figure 4 As shown, mounting blocks 24 are provided on both the front and rear sides of the limiting cylinder 10, and the mounting blocks 24 are located at the bottom of the limiting cylinder 10. A through hole 25 matching the L-shaped block 22 is provided on the mounting block 24, and a mounting plate 26 matching the flange 23 is provided in the through hole 25. The bottom plate 11 is mounted on the mounting block 24 of the limiting cylinder 10 through the flange 23 on the L-shaped block 22 matching the mounting plate 26, as shown in FIG. Figure 1 , Figure 2 and Figure 3 As shown, blocks 27 are provided on both sides of the outside of the limiting cylinder 10. The shape of the block 27 is a cube. The two blocks 27 are symmetrically distributed on the left and right sides and are parallel to each other. The block 27 is located at the bottom of the limiting cylinder 10, and the limiting cylinder 10 is detachably connected to the top of the protective shell 1 through the block 27.

[0037] like Figure 5 As shown, a connecting cross bar 28 is provided on the outer side wall of the pressure rod 13, one end of the connecting cross bar 28 is fixedly connected to one of the arc-shaped plates 17, the other end of the connecting cross bar 28 is provided with an L-shaped rod 29, and a U-shaped groove 30 is provided on the top of the connecting block 6, one end of the L-shaped rod 29 is fixedly connected to the connecting cross bar 28, and the other end of the L-shaped rod 29 is located in the U-shaped groove 30 and is detachably connected to the connecting block 6 through the U-shaped groove 30, as shown in FIG. Figure 3 As shown, the limiting cylinder 10 is provided with a slide groove 31 matching the connecting cross bar 28 , and the pressing rod 13 is connected to the limiting cylinder 10 by sliding up and down through the matching of the connecting cross bar 28 and the slide groove 31 .

[0038] like Figure 1 , Figure 2 and Figure 5 As shown, the protective shell includes an upper shell 32 and a lower shell 33, the upper shell 32 and the lower shell 33 are detachably connected, the upper shell 32 is provided with two positioning blocks 34, the positioning blocks 34 are in the shape of long strips, the two positioning blocks 34 are symmetrically distributed and parallel to each other, and the positioning blocks 34 are provided with mounting grooves 35 matching the card blocks 27, as shown in FIG. Figure 3 As shown, one side of the clamping block 27 is fixedly connected to the limiting cylinder 10, and the other side of the clamping block 27 is provided with a buckle 36. Figure 5 As shown, a slot 37 matching the buckle 36 is provided in the installation slot 35 , and the L-shaped rod 29 is located between one of the positioning blocks 34 and the connecting block 6 . The top of the connecting block 6 passes through the upper shell 32 and is detachably connected to the L-shaped rod 29 through the U-shaped slot 30 .

[0039] like Figure 3 and Figure 4 As shown, the shapes of pin 1 2 and pin 2 3 are both L-shaped, one side of pin 1 2 is fixedly connected to the metal spring sheet 5, the other side of pin 1 2 passes through the bottom of the lower shell 33 and is provided with a connecting piece 52, pin 2 3 is located on the side of the metal spring sheet 5, one end of one side of pin 2 3 is fixedly connected to the static contact 9, and the other end thereof passes through the side wall of the lower shell 33 and is fixedly connected to the other side.

[0040] like Figure 3 and Figure 4As shown, a convex plate 38 is provided in the lower shell 33, and the convex plate 38 is fixedly connected to one side of the lower shell 33. The convex plate 38 and the bottom of the lower shell 33 form a pin groove 39, and one side of the pin 2 fixedly connected to the metal spring 5 is located in the pin groove 39. The bottom of the lower shell 33 is provided with a pin groove 2 40 that matches the other side of the pin 2, and the pin groove 2 40 is located on the side of the lower shell 33. A mounting protrusion 41 is provided in the lower shell 33, and the mounting protrusion 41 is fixedly connected to the other side of the lower shell 33. The mounting protrusion 41 is located at the top of the lower shell 33, and the mounting protrusion 41 and the bottom of the lower shell 33 are parallel to each other. The top of the mounting protrusion 41 contacts the inner wall of the upper shell 32, and an upper limit block 42 and a pin groove 43 are provided at the bottom of the mounting protrusion 41. The upper limit block 42 is located on one side of the mounting protrusion 41 close to the connecting block 6. A lower limit block 44 corresponding to the upper limit block 42 is provided at the bottom of the lower shell 33, and the metal spring 5 is located at the upper limit block 42. Between the lower limit block 44, the pin groove three 43 is located at the center of the mounting protrusion 41, the top side of the pin groove three 43 is away from the metal spring 5, the bottom side of the pin groove three 43 is close to the metal spring 5, the bottom side of the pin groove three 43 is connected with the interior of the lower shell 33, one side of the pin two 3 where the static contact 9 is located is installed in the pin groove three 43, the static contact 9 is located on the bottom side of the pin groove three 43, and the outer side wall of the lower shell 3 is provided with a pin groove four 45 matching the other side of the pin two 3, and the side of the mounting protrusion 41 away from the connecting block 6 is fixedly connected to the convex plate 38.

[0041] like Figure 4 As shown, pin 1 2 passes through an edge of the bottom of the lower shell 33 and is located between pin groove 2 40 and one side of the upper shell 32. A positioning plate 46 matching pin groove 45 is provided on the other side of the upper shell 32. Pin 2 3 passes through an edge of the side wall of the lower shell 33 and is located between pin groove 45 and positioning plate 46.

[0042] like Figure 7 As shown, the shape of the metal spring piece 5 is E-shaped. The metal spring piece 5 is integrally formed by a base sheet 47 and side sheet one 48, side sheet two 49 and side sheet three 50 which are perpendicular to the base sheet 47. The side sheet two 49 is located between the side sheet one 48 and the side sheet three 50. The moving contact 8 is located on the side sheet two 49. The length of the side sheet two 49 is smaller than the length of the side sheet one 48 and the length of the side sheet three 50. Two welding points 51 are provided on an edge of the pin 2 located in the pin groove 39. The distance between the two welding points 51 is smaller than the distance between the side sheet one 48 and the side sheet three 50. One end of the side sheet one 48 is fixedly connected to the base sheet 47, and the other end of the side sheet one 48 is fixedly connected to the pin 2 through one of the welding points 51. One end of the side sheet three 50 is fixedly connected to the base sheet 47, and the other end of the side sheet three 50 is fixedly connected to the pin 2 through another welding point 51.

[0043] The present invention also provides a method for installing an overload protector, which is characterized by comprising the following steps:

[0044] Step 1: slide one end of the metal spring 5 fixedly connected to one side of the pin 1 2 from the side of the lower housing 33 into the pin groove 1 39 until the other side of the pin 1 2 is located in the pin groove 2 40, and at the same time, the other end of the metal spring 52 slides into the slot 7 at the bottom of the connecting block 6;

[0045] Step 2: slide one side of the pin 2 3 where the static contact 9 is located into the pin groove 3 43 from the other side of the lower housing 33 until the other side of the pin 2 3 is located in the pin groove 45. At this time, the static contact 9 is located at a position corresponding to the moving contact 8.

[0046] Step 3, install the upper housing 32 on the lower housing 33, so that one side of the upper housing 32 clamps the pin 1 2, and at the same time, the positioning plate 46 on the other side of the upper housing 32 is located at a position corresponding to the pin groove 45, clamping the pin 2 3;

[0047] Step 4, assembling the push-button overload protection switch 4: first install the spring 21 in the locking member 12, and the locking member 12 is installed on the bottom plate 11. At this time, one end of the spring 21 is placed in the center of the bottom plate 11, and the other end of the spring 21 is located in the locking member 12 and contacts the top of the locking member 12. Then, the guide tooth 20 on the bottom of the pressure rod 13 is assembled on the N-shaped inclined guide groove 16 of the locking member 12. Finally, the limiting cylinder 10 is installed from top to bottom, so that the connecting cross bar 28 slides into the slide groove 31, and the L-shaped block 22 on the bottom plate 11 passes through the through hole 25 on the mounting block 24 at the bottom of the limiting cylinder 10, and the flange 23 on the L-shaped block 22 is installed on the mounting plate 26;

[0048] Step five, install the push-button overload protection switch 4 on the upper shell 32: the blocks 27 on both sides of the bottom of the limit cylinder 10 slide into the mounting grooves 35 on the corresponding positioning blocks 34 along the sides of the upper shell 32. At the same time, the L-shaped rod 29 slides into the U-shaped groove 30 at the top of the connecting block 6 until the buckle 36 on the block 27 slides into the groove 37 and is fixed.

[0049] Pin 1 2 passes through an edge of the bottom of the lower shell 33 and is connected to the external power supply through the connecting piece 52, and the moving contact 8 on the metal spring 5 contacts the static contact 9 with the pin 2 3 to conduct the circuit. Pin 2 3 passes through an edge of the bottom of the lower shell 33 and is electrically connected to the device, thereby realizing the function of powering the device; when the circuit is connected, the moving contact 8 on the metal spring 5 and the static contact 9 on the pin 2 3 are in contact, and the current of the power supply flows into the device through the pin 1 2, the metal spring 5 and the pin 2 3 in turn; the user can use the button-type overload protection The switch 4 is used to control the connection or disconnection of the circuit. The push-button overload protection switch 4 drives the metal spring 5 to move through the connecting block 6, so that the moving contact 8 on the metal spring 5 is in contact with or separated from the static contact 9 on the pin 2 3. The control is convenient and the safety performance is greatly improved. In addition, when the circuit is overloaded and the metal spring 5 is deformed, the moving contact 8 on the metal spring 5 is automatically separated from the static contact 9 on the pin 2 3, and the circuit can be automatically disconnected in time, which greatly improves the timeliness and sensitivity of power failure, avoids danger, and protects the equipment from damage.

[0050] The bottom plate 11 slides into the through hole 25 through the L-shaped block 22, and the flange 23 on the L-shaped block 22 is installed on the mounting plate 26 in the through hole 25. The push-button overload protection switch 4 slides into the mounting groove 35 on the positioning block 34 as a whole through the clamping block 27. Finally, when the buckle 36 slides into the clamping groove 37, the installation of the push-button overload protection switch 4 is completed, thereby improving the position stability of the push-button overload protection switch 4.

[0051] One edge of pin 2 fixedly connected to the metal spring sheet 5 is inserted into pin groove 1 39 through the side of the lower shell 33, and the other edge of pin 2 is installed in pin groove 2 40, and is fixed by the side limit of the upper shell 32, which is convenient for the installation and removal of pin 2; one edge of pin 2 3 where the static contact 9 is located is inserted into pin groove 3 43 through the outer side wall of the lower shell 33, and the other edge of pin 2 3 is installed in pin groove 4 45, and is fixed by the positioning plate 46, which is convenient for the installation and removal of pin 2 3.

Claims

1. An overload protector, characterized in that: The invention comprises a protective shell (1), a pin 1 (2) and a pin 2 (3); the top of the protective shell (1) is provided with a push-button overload protection switch (4); a metal spring (5) is provided inside the protective shell (1); one end of the metal spring (5) is provided with a connecting block (6); the bottom of the connecting block (6) is located inside the protective shell (1) and is provided with a slot (7) matching the metal spring (5); one end of the metal spring (5) is connected to the connecting block (6) via the slot (7); the top of the connecting block (6) passes through the protective shell (1) and is connected to the push-button overload protection switch (4); The protective switch (4) is connected, the other end of the metal spring (5) is fixedly connected to the pin one (2), one end of the pin one (2) is fixedly connected to the metal spring (5), the other end of the pin one (2) passes through the protective shell (1) and is located at the bottom of the protective shell (1), the metal spring (5) is provided with a moving contact (8), one end of the pin two (3) is located in the protective shell (1) and is provided with a stationary contact (9) corresponding to the moving contact (8), and the other end of the pin two (3) passes through the protective shell (1) and is located at the bottom of the protective shell (1);The push-button overload protection switch (4) comprises a limiting cylinder (10), a bottom plate (11), a locking member (12) and a pressure rod (13); the bottom of the limiting cylinder (10) is detachably connected to the top of the protection housing (1); the bottom plate (11), the locking member (12) and the pressure rod (13) are all circular in shape and are all located in the limiting cylinder (10); the interior of the locking member (12) and the interior of the pressure rod (13) are hollow; the top of the locking member (12) is located in the pressure rod (13); the bottom of the locking member (12) is provided with a plurality of guide blocks (14); the plurality of guide blocks (14) are ) are evenly distributed along the circumference of the locking member (12) and are located outside the locking member (12); a sliding groove (15) is formed between every two adjacent guide blocks (14); the top of the guide block (14) is close to the pressure rod (13) and is provided with an N-shaped inclined guide groove (16); the bottom of the guide block (14) is away from the pressure rod (13); the top of the pressure rod (13) is sealed and passes through the top of the limiting cylinder (10); the bottom of the pressure rod (13) is provided with a plurality of arc plates (17) corresponding to the guide blocks (14); and a corresponding sliding groove (15) is formed between every two adjacent arc plates (17). The limiting cylinder (10) is provided with a plurality of sliding bars (19) respectively matching the sliding groove (15) and the sliding groove (18), the top of the sliding bar (19) is fixedly connected to the top of the limiting cylinder (10), the bottom of the sliding bar (19) is provided with a guide inclined surface matching the N-type inclined guide groove (16), wherein an arc plate (17) is fixedly connected to the connecting block (6), the arc plate (17) is provided with a guide tooth (20) matching the N-type inclined guide groove (16), the pressure rod (13) is guided by the guide tooth (20) on the arc plate (17) 20) is meshed with the N-shaped inclined guide groove (16) and connected to the locking member (12); the bottom of the locking member (12) is rotatably connected to the bottom plate (11); a spring (21) is provided in the locking member (12); the top of the locking member (12) is sealed; one end of the spring (21) is in contact with the top of the locking member (12); the other end of the spring (21) passes through the bottom of the locking member (12) and is in contact with the top of the bottom plate (11); the bottom of the bottom plate (11) is in contact with the top of the protective shell (1); and the bottom plate (11) is detachably connected to the bottom of the limiting cylinder (10);A connecting cross bar (28) is provided on the outer wall of the pressure rod (13), one end of the connecting cross bar (28) is fixedly connected to one of the arc-shaped plates (17), the other end of the connecting cross bar (28) is provided with an L-shaped rod (29), a top of the connecting block (6) is provided with a U-shaped groove (30), one end of the L-shaped rod (29) is fixedly connected to the connecting cross bar (28), the other end of the L-shaped rod (29) is located in the U-shaped groove (30) and is detachably connected to the connecting block (6) through the U-shaped groove (30), a sliding groove (31) matching the connecting cross bar (28) is provided on the limiting cylinder (10), and the pressure rod (13) is slidably connected to the limiting cylinder (10) up and down through the matching of the connecting cross bar (28) and the sliding groove (31). ; 2. An overload protector according to claim 1, characterized in that: Two L-shaped blocks (22) are provided on the side of the bottom plate (11), and the two L-shaped blocks (22) are symmetrically distributed front and back with the bottom plate (11) as the center. One end of the L-shaped block (22) is fixedly connected to the side of the bottom plate (11), and the other end of the L-shaped block (22) is provided with a flange (23). The flange (23) and the L-shaped block (22) form a Z-shaped structure. The front and rear sides of the limiting cylinder (10) are both provided with mounting blocks (24). The mounting blocks (24) are located at the bottom of the limiting cylinder (10), and the mounting blocks (24) are provided with through holes (25) matching the L-shaped blocks (22). A mounting plate (26) matching the flange (23) is provided in the through hole (25); the bottom plate (11) is mounted on the mounting block (24) of the limiting cylinder (10) by matching the flange (23) on the L-shaped block (22) with the mounting plate (26); a clamping block (27) is provided on both left and right sides of the limiting cylinder (10); the clamping block (27) is in the shape of a cube; the two clamping blocks (27) are symmetrically distributed and parallel to each other; the clamping block (27) is located at the bottom of the limiting cylinder (10); and the limiting cylinder (10) is detachably connected to the top of the protective shell (1) via the clamping block (27).

3. An overload protector according to claim 1, characterized in that: The protective shell comprises an upper shell (32) and a lower shell (33), the upper shell (32) being detachably connected to the lower shell (33), the upper shell (32) being provided with two positioning blocks (34), the positioning blocks (34) being in the shape of an elongated strip, the two positioning blocks (34) being symmetrically distributed and parallel to each other, the positioning blocks (34) being provided with a mounting groove (35) matching with the clamping block (27), one side of the clamping block (27) being fixedly connected with the limiting cylinder (10), the other side of the clamping block (27) being provided with a buckle (36), the mounting groove (35) being provided with a clamping groove (37) matching with the buckle (36), the L-shaped rod (29) being located between one of the positioning blocks (34) and the connecting block (6), the top of the connecting block (6) passing through the upper shell (32) and being detachably connected with the L-shaped rod (29) via the U-shaped groove (30).

4. An overload protector according to claim 3, characterized in that: The shape of the pin one (2) and the shape of the pin two (3) are both L-shaped, one side of the pin one (2) is fixedly connected to the metal spring (5), the other side of the pin one (2) passes through the bottom of the lower shell (33) and is provided with a connecting piece (52), the pin two (3) is located on the side of the metal spring (5), one end of one side of the pin two (3) is fixedly connected to the static contact (9), and the other end passes through the side wall of the lower shell (33) and is fixedly connected to the other side.

5. An overload protector according to claim 4, characterized in that: A convex plate (38) is provided in the lower shell (33), and the convex plate (38) is fixedly connected to one side of the lower shell (33). The convex plate (38) and the bottom of the lower shell (33) form a pin groove (39), and one side of the pin (2) fixedly connected to the metal spring (5) is located in the pin groove (39). The bottom of the lower shell (33) is provided with a pin groove (40) matching the other side of the pin (2), and the pin groove (40) is located on the side of the lower shell (33).

6. An overload protector according to claim 5, characterized in that: The lower shell (33) is provided with a mounting protrusion (41), the mounting protrusion (41) is fixedly connected to the other side of the lower shell (33), the mounting protrusion (41) is located at the top of the lower shell (33), the mounting protrusion (41) and the bottom of the lower shell (33) are parallel to each other, the top of the mounting protrusion (41) contacts the inner side wall of the upper shell (32), the bottom of the mounting protrusion (41) is provided with an upper limit block (42) and a pin groove (43), the upper limit block (42) is located on one side of the mounting protrusion (41) close to the connecting block (6), the bottom of the lower shell (33) is provided with a lower limit block (44) corresponding to the upper limit block (42), and the metal spring (5) is located at the upper limit block (4 2) and a lower limit block (44), the pin groove three (43) is located at the center of the mounting protrusion (41), the top side of the pin groove three (43) is away from the metal spring (5), the bottom side of the pin groove three (43) is close to the metal spring (5), the bottom side of the pin groove three (43) is connected to the interior of the lower shell (33), one side of the pin two (3) where the static contact (9) is located is installed in the pin groove three (43), the static contact (9) is located on the bottom side of the pin groove three (43), the outer side wall of the lower shell (33) is provided with a pin groove four (45) matching the other side of the pin two (3), and the side of the mounting protrusion (41) away from the connecting block (6) is fixedly connected to the convex plate (38).

7. An overload protector according to claim 6, characterized in that: The pin one (2) passes through an edge of the bottom of the lower shell (33) and is located between the pin groove two (40) and one side of the upper shell (32); a positioning plate (46) matching the pin groove four (45) is provided on the other side of the upper shell (32); and the pin two (3) passes through an edge of the side wall of the lower shell (33) and is located between the pin groove four (45) and the positioning plate (46).

8. An overload protector according to claim 5, characterized in that: The metal spring sheet (5) is in an E-shape. The metal spring sheet (5) is integrally formed by a base sheet (47) and a side sheet one (48), a side sheet two (49) and a side sheet three (50) which are perpendicular to the base sheet (47). The side sheet two (49) is located between the side sheet one (48) and the side sheet three (50). The moving contact (8) is located on the side sheet two (49). The length of the side sheet two (49) is respectively smaller than the length of the side sheet one (48) and the length of the side sheet three (50). The pin one (2) is located in the pin slot one (39). ), two welding points (51) are provided on one edge within the side panel (47), the distance between the two welding points (51) is smaller than the distance between the side panel one (48) and the side panel three (50), one end of the side panel one (48) is fixedly connected to the base panel (47), the other end of the side panel one (48) is fixedly connected to the pin one (2) via one of the welding points (51), one end of the side panel three (50) is fixedly connected to the base panel (47), and the other end of the side panel three (50) is fixedly connected to the pin one (2) via another welding point (51).

9. The method for installing an overload protector according to any one of claims 6 to 7, characterized in that: The following steps are involved: Step 1: slide one end of the metal spring (5) fixedly connected to one side of the pin 1 (2) from the side of the lower housing (33) into the pin groove 1 (39) until the other side of the pin 1 (2) is located in the pin groove 2 (40), and at the same time, slide the other end of the metal spring (5) into the slot (7) at the bottom of the connecting block (6); Step 2, sliding one edge of the pin 2 (3) where the stationary contact (9) is located into the pin slot 3 (43) from the other side of the lower housing (33) until the other edge of the pin 2 (3) is located in the pin slot 4 (45), at which time the stationary contact (9) is located at a position corresponding to the moving contact (8); Step three, installing the upper housing (32) on the lower housing (33) so that one side of the upper housing (32) clamps the pin one (2), and at the same time, the positioning plate (46) on the other side of the upper housing (32) is located at a position corresponding to the pin groove four (45), clamping the pin two (3); Step 4, assembling the push-button overload protection switch (4): first install the spring (21) in the locking member (12), and the locking member (12) is installed on the bottom plate (11). At this time, one end of the spring (21) is placed in the center of the bottom plate (11), and the other end of the spring (21) is located in the locking member (12) and contacts the top of the locking member (12). Then, the guide tooth (20) on the bottom of the pressure rod (13) is assembled on the N-shaped inclined guide groove (16) of the locking member (12). Finally, the limiting cylinder (10) is installed from top to bottom, so that the connecting cross bar (28) slides into the slide groove (31), and the L-shaped block (22) on the bottom plate (11) passes through the through hole (25) on the mounting block (24) at the bottom of the limiting cylinder (10), and the flange (23) on the L-shaped block (22) is installed on the mounting plate (26); Step 5, installing the push-button overload protection switch (4) on the upper housing (32): the blocks (27) on both sides of the bottom of the limit cylinder (10) slide along the side of the upper housing (32) into the mounting grooves (35) on the corresponding positioning blocks (34), and at the same time, the L-shaped rod (29) slides into the U-shaped groove (30) on the top of the connecting block (6) until the buckle (36) on the block (27) slides into the groove (37) and is fixed.

Images