Circuit protection device

Abstract

A circuit protection device disclosed by the present invention is characterized in that a protection plate and four buffer mechanisms are arranged in an accommodating cavity in a box body, the protection plate surrounds the periphery of a circuit device body in the accommodating cavity and fits the circuit device body, and each buffer mechanism comprises a sliding rod, a sliding piece, a connecting rod, a buffer spring and a connecting block. When the circuit device body in the containing cavity shakes, the circuit device body extrudes a protection plate, then the protection plate transmits force to a connecting block, the connecting block extrudes a sliding piece, then the sliding piece slides towards the two sides on the outer wall of a sliding rod to extrude a buffer spring, and then the buffering effect can be achieved; the circuit device body is prevented from being damaged by the interior of the box body, and the technical problem that the protection performance of an existing circuit protection device is poor due to the fact that the interior of the box body is damaged when the circuit body in the box body is bumped is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit protection equipment, and in particular to a circuit protection device. Background Art

[0002] Power electronic devices are devices composed of various power electronic circuits, including rectifiers, inverters, DC converters, AC converters, various power supplies and switches, motor speed control devices, DC transmission devices, induction heating devices, reactive power compensation devices, electroplating and electrolysis devices, household appliance converters, etc.

[0003] Power electronic devices are easily damaged by external forces, so protective devices are needed for storage. The existing power electronic device protective devices are box structures, which only consider external mechanical impact protection, but do not consider the damage caused to the circuit body inside the box when the circuit body is bumped, and the protective performance is poor. Summary of the invention

[0004] The invention provides a circuit protection device for solving the technical problem that the existing circuit protection device has poor protection performance because the circuit body inside the box body is damaged when the circuit body inside the box body is bumped.

[0005] In view of this, the present invention provides a circuit protection device, comprising a box body and a box cover, characterized in that it also comprises an internal buffering and anti-collision device;

[0006] A receiving cavity for fixing the circuit device body is arranged at the center of the box body;

[0007] The internal buffer anti-collision device comprises a protective plate and four buffer mechanisms. The protective plate is arranged around the circuit device body in the accommodating cavity and fits the circuit device body. The protective plate is connected to the four buffer mechanisms. The four buffer mechanisms are arranged at four sides of the accommodating cavity respectively.

[0008] The buffer mechanism includes a sliding rod, a sliding member, a connecting rod, a buffer spring and a connecting block, the two ends of the sliding rod are respectively fixed on the inner wall of the box body, the buffer spring includes a first buffer spring and a second buffer spring, the sliding member includes a first sliding member and a second sliding member, the connecting rod includes a first connecting rod and a second connecting rod, the first buffer spring is sleeved on one end of the sliding rod, the second buffer spring is sleeved on the other end of the sliding rod, the first sliding member and the second sliding member are sleeved on the sliding rod, the first sliding member is fixedly connected to the end of the first buffer spring near the middle position of the sliding rod, the second sliding member is fixedly connected to the end of the second buffer spring near the middle position of the sliding rod, one end of the first connecting rod is hinged to the first sliding member, the other end of the first connecting rod is hinged to the connecting block, one end of the second connecting rod is hinged to the second sliding member, and the other end of the second connecting rod is hinged to the connecting block;

[0009] The top of the side of the box body is hinged to the box cover, and a cavity corresponding to the accommodating cavity is arranged at the center position of the inner side of the box cover.

[0010] Optionally, a mounting cavity is provided inside the side wall of the box body, and a moving plate, a pull rod, a return spring and a limit block are provided inside the mounting cavity;

[0011] One end of the pull rod passes through the side wall of the box body and is movably connected to the side wall of the box body, the other end of the pull rod is fixedly connected to one end of the moving plate, the moving plate is slidably connected to the bottom of the installation cavity, a return spring is sleeved on the pull rod, one end of the return spring is fixedly connected to the side wall of the box body, the other end of the return spring is fixedly connected to one end of the moving plate, a limit block is arranged on the top of the moving plate, a through opening is opened on the top of the installation cavity, and the position of the through opening matches the position of the limit block when it is reset;

[0012] A clamping block used in conjunction with the limiting block is arranged on the side wall of the box cover, and the clamping block passes through the through opening and is clamped with the limiting block when the box cover is closed.

[0013] Optionally, there are two limit blocks, and the two limit blocks are respectively arranged at positions of the movable plate close to two ends of the movable plate.

[0014] Optionally, a pop-up assembly is further included, the pop-up assembly including a mounting block, a fixing rod, a movable block, a pop-up ball and a supporting spring;

[0015] The mounting block is fixed on the inner wall of the mounting cavity, the bottom of the mounting block is higher than the top of the movable plate, at least two fixing rods are fixed on the top of the mounting block, the fixing rods are installed on both sides of the mounting block along the length direction of the movable plate, a through hole for passing the fixing rods is opened on the movable block, at least one pop-up ball is fixed on the top of the movable block, one end of the support spring is fixed on the top of the mounting block, and the other end of the support spring is fixed on the bottom of the movable block;

[0016] The top of the side wall of the box body is provided with an activity opening for the pop-up ball to pop out.

[0017] Optionally, the number of the fixing rods is two, the number of the supporting springs is two, and the two supporting springs are arranged between the two fixing rods.

[0018] Optionally, the limiting block is integrally connected to the movable plate.

[0019] Optionally, the top of the limiting block is an inclined surface.

[0020] Optionally, the card block is integrally connected to the box cover.

[0021] Optionally, a buffer material is pasted on one side of the protective plate that is in contact with the circuit device body.

[0022] Optionally, the buffer material is rubber.

[0023] It can be seen from the above technical solutions that the circuit protection device provided by the present invention has the following advantages:

[0024] The circuit protection device provided by the present invention comprises a protective plate and four buffer mechanisms arranged in an accommodating chamber inside a box body, the protective plate being arranged in the accommodating chamber around the circuit device body and fitting the circuit device body, the buffer mechanism comprising a sliding rod, a sliding member, a connecting rod, a buffer spring and a connecting block, the two ends of the sliding rod being respectively fixed on the inner wall of the box body, the buffer spring comprising a first buffer spring and a second buffer spring, the sliding member comprising a first sliding member and a second sliding member, the connecting rod comprising a first connecting rod and a second connecting rod, the first buffer spring being sleeved on one end of the sliding rod, the second buffer spring being sleeved on the other end of the sliding rod, the first sliding member and the second sliding member being sleeved on the sliding rod, the first sliding member being fixedly connected to an end of the first buffer spring close to a middle position of the sliding rod, the second sliding member being fixedly connected to an end of the second buffer spring close to a middle position of the sliding rod, one end of the first connecting rod being hinged to the first sliding member, the other end of the first connecting rod being hinged to the connecting block, one end of the second connecting rod being hinged to the second sliding member, and the other end of the second connecting rod being hinged to the connecting block. When the circuit device body in the accommodating cavity shakes, the circuit device body will squeeze the protective plate, and then the protective plate will transfer the force to the connecting block, and the connecting block will squeeze the sliding part, and then the sliding part will slide to both sides on the outer wall of the sliding rod to squeeze the buffer spring, thereby achieving a buffering effect, avoiding damage to the circuit device body caused by the inside of the box body, and solving the technical problem that the existing circuit protection device has poor protection performance because it takes into account the damage caused to the circuit body inside the box body when it is bumped. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of a circuit protection device provided in an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A is an enlarged structural diagram;

[0028] Figure 3 A schematic diagram of the structure of a buffer structure provided in an embodiment of the present invention;

[0029] Figure 4 for Figure 1 The enlarged structural diagram at C in FIG.

[0030] Wherein, the accompanying drawings are marked as follows:

[0031] 1. Box body; 2. Box cover; 3. Circuit device body; 51. Installation cavity; 52. Moving plate; 53. Reset spring; 54. Limit block; 55. Block; 56. Through port; 57. Pull rod; 61. Sliding rod; 62. Sliding member; 63. Buffer spring; 64. Connecting rod; 65. Connecting block; 66. Protective plate; 71. Installation block; 72. Fixed rod; 73. Movable block; 74. Pop-up ball; 75. Movable port; 76. Support spring; 8. Accommodating cavity. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] For easier understanding, see Figures 1 to 3 , the present invention provides an embodiment of a circuit protection device, comprising a box body 1 and a box cover 2, and also comprising an internal buffering and anti-collision device;

[0034] A receiving cavity 8 for fixing the circuit device body 3 is provided at the center of the box body 1;

[0035] The internal buffer anti-collision device includes a protective plate 66 and four buffer mechanisms. The protective plate 66 is arranged around the circuit device body 3 in the accommodating cavity 8 and fits the circuit device body 3. The protective plate 66 is connected to the four buffer mechanisms, which are respectively arranged at four sides of the accommodating cavity 8.

[0036] The buffer mechanism includes a slide bar 61, a slide member 62, a connecting rod 64, a buffer spring 63 and a connecting block 65, the two ends of the slide bar 61 are respectively fixed on the inner wall of the box body 1, the buffer spring 63 includes a first buffer spring and a second buffer spring, the slide member 62 includes a first slide member and a second slide member, the connecting rod 64 includes a first connecting rod and a second connecting rod, the first buffer spring is sleeved on one end of the slide bar 61, the second buffer spring is sleeved on the other end of the slide bar 61, the first slide member and the second slide member are sleeved on the slide bar 61, the first slide member is fixedly connected to the end of the first buffer spring near the middle position of the slide bar 61, the second slide member is fixedly connected to the end of the second buffer spring near the middle position of the slide bar 61, one end of the first connecting rod is hinged to the first slide member, the other end of the first connecting rod is hinged to the connecting block 65, one end of the second connecting rod is hinged to the second slide member, and the other end of the second connecting rod is hinged to the connecting block 65;

[0037] The top of the side of the box body 1 is hinged to the box cover 2 , and a cavity corresponding to the accommodating cavity 8 is arranged at the inner center of the box cover 2 .

[0038] It should be noted that the circuit device body 3 is generally a rectangular structure, and the box body 1 and the box cover 2 are also rectangular structures. A receiving cavity 8 for fixing the circuit device body 3 is provided at the center position inside the box body 1, and the circuit device body 3 is placed in the receiving cavity 8. The protective plate 66 is arranged around the circuit device body 3 in the receiving cavity 8 to fit the circuit device body 3, and is used to protect the circuit device body 3. The four protective plates 66 correspond to the four buffer mechanisms. When the circuit device body 3 in the receiving cavity 8 shakes, the circuit device body 3 will squeeze the protective plate 66, and then the protective plate 66 will transfer the force to the connecting block 65, and the connecting block 65 will squeeze the sliding member 62, and then the sliding member 62 will slide to both sides on the outer wall of the slide rod 61 to squeeze the buffer spring 63, so as to achieve a buffering effect, avoid damage to the circuit device body 3 caused by the inside of the box body 1, and solve the technical problem that the existing circuit protection device is not good in terms of protection performance when the circuit body inside the box body 1 is damaged by bumps. In order to prevent the circuit device body 3 from mechanically impacting the protective plate 66 when squeezing the protective plate 66, a buffer material may be attached to the side of the protective plate 66 that contacts the circuit device body 3. The buffer material is rubber or silicone.

[0039] In one embodiment, see Figures 1 to 3The side wall of the box body 1 of the circuit protection device is provided with an installation cavity 51, and a movable plate 52, a pull rod 57, a reset spring 53 and a limit block 54 are provided inside the installation cavity 51. One end of the pull rod 57 passes through the side wall of the box body 1 and is movably connected to the side wall of the box body 1, and the other end of the pull rod 57 is fixedly connected to one end of the movable plate 52, and the movable plate 52 is slidably connected to the bottom of the installation cavity 51. The reset spring 53 is sleeved on the pull rod 57, one end of the reset spring 53 is fixedly connected to the side wall of the box body 1, and the other end of the reset spring 53 is fixedly connected to one end of the movable plate 52. The limit block 54 is arranged on the top of the movable plate 52, and a through opening 56 is opened at the top of the installation cavity 51. The position of the through opening 56 matches the position of the limit block 54 when it is reset. A clamping block 55 used in conjunction with the limit block 54 is provided on the side wall of the box cover 2, and the clamping block 55 passes through the through opening 56 and is clamped with the limit block 54 when the box cover 2 is closed. The reset spring 53 is used to push the movable plate 52 to reset. The other end of the reset spring 53 is fixedly connected to the inner wall of the installation cavity 51. The upper end of the movable plate 52 is fixedly connected to the limit block 54, which is used to limit and guide the opening and closing action of the box cover 2. The outer wall of the box cover 2 is fixedly connected with a block 55, and the top of the installation cavity 51 is provided with a through opening 56. One end of the movable plate 52 is fixedly connected with a pull rod 57, and the other end of the pull rod 57 movably penetrates the box body 1. The opening length and width of the through opening 56 are greater than the length and width of the block 55, thereby ensuring that the block 55 can pass through the through opening 56. When in use, first turn the box cover 2 to close. When the box cover 2 is closed, the block 55 on its outer wall will enter the interior of the through-port 56. At the same time, the protruding end of the block 55 will contact the inclined surface of the limit block 54, and then push the limit block 54 and the moving plate 52 to the side. When the protruding end of the block 55 does not contact the inclined surface, the reset spring 53 will push the moving plate 52 to reset under the action of elastic force, and then the block 55 will clamp the limit block 54, so that the box cover 2 can be closed. When it is necessary to open, the moving plate 52 is pulled to the side by pulling the pull rod 57 outward. When the limit block 54 at the upper end of the moving plate 52 releases the restriction on the block 55, the box cover 2 can be opened. The closing of the box cover 2 realizes the opening and closing function through simple operating steps, without the need for additional tools or complicated operating steps, and is highly convenient. The number of the limit blocks 54 is two, and the two limit blocks 54 are respectively arranged at the positions of the moving plate 52 near the two ends of the moving plate 52. The limit block 54 is integrally connected with the movable plate 52. The top of the limit block 54 is an inclined surface. The clamping block 55 is integrally connected with the box cover 2.

[0040] In one embodiment, see Figures 1 to 4The circuit protection device of the present invention also includes a pop-up component, which includes a mounting block 71, a fixed rod 72, a movable block 73, a pop-up ball 74 and a support spring 76. The mounting block 71 is fixed on the inner wall of the mounting cavity 51, the bottom of the mounting block 71 is higher than the top of the movable plate 52, at least two fixed rods 72 are fixed on the top of the mounting block 71, the fixed rods 72 are installed on both sides of the mounting block 71 along the length direction of the movable plate 52, a through hole for passing the fixed rods 72 is opened on the movable block 73, at least one pop-up ball 74 is fixed on the top of the movable block 73, one end of the support spring 76 is fixed on the top of the mounting block 71, and the other end of the support spring 76 is fixed on the bottom of the movable block 73, and a movable opening 75 for the pop-up ball 74 to pop out is opened on the top of the side wall of the box body 1. When in use, when the box cover 2 is closed, the pop-up ball 74 will enter the interior of the installation cavity 51 under the push of the box cover 2, and will not affect the normal closing of the box cover 2. When the box cover 2 is opened, when the limit block 54 at the upper end of the movable plate 52 releases the restriction on the block 55, the support spring 76 will push the movable block 73 to slide on the outer wall of the fixed rod 72 to the upper end, and then drive the pop-up ball 74 to enter the movable opening 75 to the upper end, so as to pop the box cover 2 open. There are two fixed rods 72, two support springs 76, and two support springs 76 are arranged between the two fixed rods 72. There are three pop-up balls 74. The design of the pop-up assembly ensures that the box cover 2 can be popped up after the restriction is released, providing an easy opening method. Through the upward movement of the pop-up ball 74, the box cover 2 will be pushed open with less force, avoiding the trouble of the user directly applying a large force to open it by hand.

[0041] The terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0042] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circuit protection device, comprising a box body and a box cover, characterized in that: It also includes internal cushioning and anti-collision devices; A receiving cavity for fixing the circuit device body is arranged at the center of the box body; The internal buffer anti-collision device comprises a protective plate and four buffer mechanisms. The protective plate is arranged around the circuit device body in the accommodating cavity and fits the circuit device body. The protective plate is connected to the four buffer mechanisms. The four buffer mechanisms are arranged at four sides of the accommodating cavity respectively. The buffer mechanism includes a sliding rod, a sliding member, a connecting rod, a buffer spring and a connecting block, the two ends of the sliding rod are respectively fixed on the inner wall of the box body, the buffer spring includes a first buffer spring and a second buffer spring, the sliding member includes a first sliding member and a second sliding member, the connecting rod includes a first connecting rod and a second connecting rod, the first buffer spring is sleeved on one end of the sliding rod, the second buffer spring is sleeved on the other end of the sliding rod, the first sliding member and the second sliding member are sleeved on the sliding rod, the first sliding member is fixedly connected to the end of the first buffer spring near the middle position of the sliding rod, the second sliding member is fixedly connected to the end of the second buffer spring near the middle position of the sliding rod, one end of the first connecting rod is hinged to the first sliding member, the other end of the first connecting rod is hinged to the connecting block, one end of the second connecting rod is hinged to the second sliding member, and the other end of the second connecting rod is hinged to the connecting block; The top of the side of the box body is hinged to the box cover, and a cavity corresponding to the accommodating cavity is arranged at the center position of the inner side of the box cover.

2. The circuit protection device according to claim 1, characterized in that: An installation cavity is arranged inside the side wall of the box body, and a moving plate, a pull rod, a return spring and a limit block are arranged inside the installation cavity; One end of the pull rod passes through the side wall of the box body and is movably connected to the side wall of the box body, the other end of the pull rod is fixedly connected to one end of the moving plate, the moving plate is slidably connected to the bottom of the installation cavity, a return spring is sleeved on the pull rod, one end of the return spring is fixedly connected to the side wall of the box body, the other end of the return spring is fixedly connected to one end of the moving plate, a limit block is arranged on the top of the moving plate, a through opening is opened on the top of the installation cavity, and the position of the through opening matches the position of the limit block when it is reset; A clamping block used in conjunction with the limiting block is arranged on the side wall of the box cover, and the clamping block passes through the through opening and is clamped with the limiting block when the box cover is closed.

3. The circuit protection device according to claim 2, characterized in that: There are two limit blocks, and the two limit blocks are respectively arranged at positions of the moving plate close to two ends of the moving plate.

4. The circuit protection device according to claim 3, characterized in that: Also included is an ejection assembly, which includes a mounting block, a fixing rod, a movable block, an ejection ball, and a support spring; The mounting block is fixed on the inner wall of the mounting cavity, the bottom of the mounting block is higher than the top of the movable plate, at least two fixing rods are fixed on the top of the mounting block, the fixing rods are installed on both sides of the mounting block along the length direction of the movable plate, a through hole for passing the fixing rods is opened on the movable block, at least one pop-up ball is fixed on the top of the movable block, one end of the support spring is fixed on the top of the mounting block, and the other end of the support spring is fixed on the bottom of the movable block; The top of the side wall of the box body is provided with an activity opening for the pop-up ball to pop out.

5. The circuit protection device according to claim 4, characterized in that: The number of the fixing rods is two, the number of the supporting springs is two, and the two supporting springs are arranged between the two fixing rods.

6. The circuit protection device according to claim 2, characterized in that: The limit block is integrally connected with the movable plate.

7. The circuit protection device according to claim 2, characterized in that: The top of the limiting block is an inclined surface.

8. The circuit protection device according to claim 2, characterized in that: The card block is integrally connected with the box cover.

9. The circuit protection device according to claim 1, characterized in that: A buffer material is pasted on the side of the protection plate that is in contact with the circuit device body.

10. The circuit protection device according to claim 9, characterized in that: The cushioning material is rubber.

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