CN216015243U - Binding post's mounting structure and circuit breaker - Google Patents

Abstract

The utility model provides a binding post's mounting structure and circuit breaker thereof belongs to low-voltage apparatus technical field, including being used for holding connection frame, wiring board and screw and allowing the connection frame wherein remove and adjust the lower wiring space with the interval between the wiring board, the wiring space is equipped with buffer structure to outer opening one side down: the buffer structure has a first shape which can be contacted and matched with the screw to generate a resisting force before the screw is screwed to the screwless teeth, and has a second shape which can press the screw to prevent the screw from being separated from the threaded hole of the wire frame when the screw moves from the screwless teeth to the screwless teeth. Through buffer structure, the screw that the drive connection frame reciprocating motion received the restriction and can be fixed a position at last process of screwing to extreme position, can keep the screw to keep the screw thread fit state with the screw hole of connection frame all the time and can not appear transitionally screwing on, improves the reliability that binding post used, prolongs the life of product.

Description

Binding post's mounting structure and circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field especially relates to a binding post's mounting structure and applied circuit breaker that has aforementioned mounting structure.

Background

Among the low-voltage apparatus, the wiring mode of low-voltage apparatus such as general miniature circuit breaker, contactor, relay adopts the tunnel type, as shown in fig. 1, it is including the wire frame, the screw, the wiring board, and simultaneously, low-voltage apparatus such as miniature circuit breaker front end or rear end or preceding, be equipped with the casing space on the back both ends, the wire frame, the screw, the wiring board is held in the casing space, through twisting the steerable wire frame of screw and moving up and down, when the wire frame falls to the below, the wiring hole that exposes is the biggest, when the wire frame removed to the top, the wiring hole between wire frame and the wiring board dwindles.

When the height of the shell space is the same as the relative rising height between the wiring frame and the screw, due to certain processing tolerance of parts, when the wiring frame moves to the lowest part, the screw is continuously screwed or the screw falls out after being completely screwed out, and cannot enter the threaded hole on the wiring frame to be matched with the threaded hole, so that the terminal is failed.

So making the height in the housing space less than the relative rise height between the wire frame and the screw avoids the above problems, but creates new problems: when the wiring frame moves to the lowest side, the screw is continuously screwed to enable the screw to be abutted against the top blocking wall of the shell space, so that the screw cannot rise, thread damage is caused, and wiring virtual connection and temperature rise can be caused to cause safety accidents.

Based on this, the present application is proposed.

Disclosure of Invention

The utility model provides a not enough to prior art, the utility model provides a binding post's mounting structure and circuit breaker solves among the prior art that the low screw that arouses of adaptation degree drops, the screw thread damages the scheduling problem, improves binding post and assembly space's suitability, maintains binding post stable in structure in the operation use to in-service use.

In order to achieve the above object, the utility model discloses binding post's mounting structure's concrete structure as follows: including the wiring space that is used for holding connection frame, wiring board and screw, the wiring board follow the outside of connection frame is inserted and is located in the frame groove of connection frame, through twist change screw drive connection frame be in move adjustable with the interval between the wiring board of connection frame clearance fit in the wiring space. The wiring space is provided with a buffer structure on one side of the external opening: the buffer structure has a first shape which can generate a resisting force when the screw is in contact with the screw before being screwed to the screwless teeth, and a second shape which can press the screw to prevent the screw from being separated from the threaded hole of the wire connecting frame when the screw moves from the screwless teeth to the screwless teeth.

The utility model discloses in, because the screw thread pole portion of screw is not setting up threaded in the position department that is close to its regulation cap portion, consequently when screwing up, the junction of screw and connection frame can move towards regulation cap position along with twisting, when the screw region on following the screw thread pole portion on the connecting rod will move to no screw thread region, for the screw is twisted to no screw thread for the time.

The buffer structure is arranged on one side of the external opening of the wiring space, the buffer structure has switchable state changes at the two positions, and the first state, the second state and the distance between the first state and the second state are matched to form a buffer area. When the screw is not in contact with the buffer structure, the buffer structure is in a natural state and in a first form, when the screw is in contact with the first form of the buffer structure in an screwing process (i.e. a screwing process that the wire frame moves close to one side of the screw), the buffer structure generates a reaction force to slow down the rising potential head of the screw, and then when the screw is continuously screwed up to a second form of the buffer structure, the second form of the buffer structure can limit the screw to continuously move upwards.

Through the aforesaid buffer structure, the utility model discloses not only can twist on the screw buffering in advance, reduce and destroy when extreme position, also can twist removal, the location with it of extreme position restriction screw to effectively prevent like among the prior art because the screw excessively rises to damage the screw thread and the screw hole that the connection frame spiral shell was twisted out to the screw lead to the fact to lose the complex situation and take place, thereby improved the reliability of product, convenient to use effectively.

And the screw is acted by the buffer structure from the first form, so that the screw can be limited to the current position and is prevented from moving upwards by a large resistance when the screw moves to the second form.

The utility model discloses further set up as follows: in the moving direction of the wire frame, the distance between the first form and the second form is not less than 1mm and not more than 1.4mm, and within the range, the first form and the second form can be separated by a certain distance, so that the buffering effect of the first form can be ensured, meanwhile, the first form is prevented from being too advanced to influence the screwing of the screw, and the screw can be conveniently and easily rotated before being close to the limit position.

The utility model discloses further set up as follows: the buffer structure comprises at least one sheet body with one fixed side and the other swingable side, wherein the sheet body is in a first form when not stressed, and the swingable side of the sheet body deforms from the first form to a second form when stressed. The structure is simple, the swing amplitude of the other side can be controlled within the small range, and the implementation is convenient.

The utility model discloses further set up as follows: the lamellar body is the plastic sheet, and the structural strength of self is higher, not only not fragile, elastic force is less, limited and can be steadily reaction force at its atress wobbling range, and plastic materials's supplied materials is extensive, the price is low, also be convenient for with the casing body integrated processing of low-voltage apparatus such as circuit breaker.

The utility model discloses further set up as follows: the buffer structure is arranged at an external opening of the wiring space.

For convenient processing, the utility model discloses further set up as follows: the buffer structure and the shell structure forming the wiring space are integrally formed.

The utility model discloses further set up as follows: the external opening is provided with a limiting structure, and the limiting structure is closer to the outside than the buffer structure and is used for limiting the tilting angle of the other side of the sheet body to form a second form of the buffer structure. The limiting structure is used for limiting the buffer structure and stabilizing the second form of the buffer structure, so that the phenomenon that the second form of the flaky buffer structure is displaced due to overlarge stress of the buffer structure is avoided, and the stability of the structure is further improved.

For convenient processing and not influence twisting screw in the normal use process, the utility model discloses further set up as follows: the limiting structure is a limiting bulge or a limiting flange arranged along the edge of the external opening.

The utility model discloses further set up as follows: the wiring space is formed by covering two shells relatively, and the limiting structure and the buffer structure are arranged on different shells. Because the limit structure and the buffer structure are respectively arranged on different shells, the limit structure limits the buffer structure in an assembly mode, the structure of a single shell is greatly simplified, and the manufacturing difficulty and the manufacturing cost of the die are reduced.

Another object of the present invention is to provide a circuit breaker, which includes the above-mentioned mounting structure and a wiring terminal, wherein the wiring terminal includes a wiring frame, a screw and a wiring board, and the wiring frame is mounted in the wiring space; the screw is positioned in the wiring space, the threaded rod part of the screw is in threaded connection with the wiring frame, the adjusting cap part of the screw is opposite to the external opening of the wiring space, and when the screw is in threaded connection with the wiring frame, the head end of the screw is in clearance fit or contact fit with the first form of the buffer structure.

In the utility model, the micro clearance fit means that the spacing distance is 0.05 mm-0.15 mm; the zero clearance fit is 0-0.05 mm.

The utility model has the advantages as follows: the utility model discloses a set up buffer structure, it has set up buffer region to outer open-ended one side in the wiring space, after the screw contacted buffer structure's first form in last screwing process (even the connection frame is close the wrong process of changeing that screw one side removed), utilize buffer structure to slow down the rising potential head of screw to the reaction force that the screw was applyed, the second form restriction screw through buffer structure continues to shift up simultaneously, prevent that the screw from excessively rising to damage the screw thread, can stop rising when making the screw twist no thread, just in time push down the screw and make the screw can not break away from the connection frame screw hole, thereby play the positioning action, and then overcome among the prior art when the screw is twisted no thread position because processing error leads to screw and connection frame screw to lose the complex situation easily and take place.

The utility model discloses among the specially adapted modern automation industry's development, use electric screwdriver or pneumatic screwdriver to twist the actual operating condition who changes the screw and operate, can use the speed when moving back the screw that electric screwdriver or pneumatic screwdriver brought, the great excessive bad consequence of twisting the transduction and sending that probably cause of strength through setting up buffer effective control, improve low-voltage apparatus's the number of times of using repeatedly.

Drawings

Fig. 1 is a schematic view of a mounting structure of a terminal in the prior art.

Fig. 2 is the overall schematic diagram of the circuit breaker according to the embodiment of the present invention.

Fig. 3 is a general schematic diagram of an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an embodiment of the present invention.

Fig. 5 is a schematic front view of fig. 4.

Reference numerals: 1. a screw; 2. a wiring frame; 3. a wiring board; 100. a first shell; 110. limiting and blocking edges; 200. a second shell; 210. an arc sheet body; 211. performing gap sewing; 220. an upper wiring space; 230. and a lower wiring space.

Detailed Description

The utility model provides a binding post's mounting structure and circuit breaker thereof, binding post's mounting structure is including lower wiring space 230 and last wiring space 220, and one side and last wiring space 220 intercommunication of lower wiring space 230 install under 2 initial conditions in lower wiring space 230 and can follow the upward wiring space 220 of lower wiring space 230 and remove. The upper wiring space 220 is provided therein with a buffer structure having a first shape in which the buffer structure starts to collide with the screw 1 before the screw 1 is screwed to the non-screw tooth and generates a contact force, and a second shape in which the screw 1 is pressed so as not to be separated from the wiring frame 2 when the screw 1 is screwed to the non-screw tooth. Through the buffer structure, the action of the screw 1 for driving the wire frame 2 to reciprocate at the position close to the limit position is limited and can be positioned, and therefore the screw 1 and the wire frame 2 are effectively matched.

The present invention will be described in detail with reference to the following embodiments.

Embodiment 1 this embodiment provides a mounting structure of a connection terminal, which mainly comprises a connection space communicating with the outside and having an opening to the outside, the connection space comprising a lower connection space 230 for mounting the connection frame 2 and the connection block 3, and an upper connection space 220 for mounting the screw 1. The lower wiring space 230 communicates with the upper wiring space 220 and each allows the wiring frame 2 to move up and down therein, and as shown in fig. 3, the assembling relationship of the wiring frame 2, the wiring board 3 and the screw 1 is the prior art, the wiring board 3 is fixed on the housing of the product, one end thereof is inserted into the frame groove of the wiring frame 2, and by turning the screw 1, the upper wiring space 220 allows the wiring frame 2 to move up and down therein in the up and down direction in fig. 4 to adjust the relative distance between the bottom of the wiring frame 2 and the wiring board 3, so as to facilitate the wiring operation. Of course, the wire frame 2 cannot be moved entirely into the upper wiring space, limited by the presence of the wiring board 3. When the wire frame 2 moves toward the upper wiring space 220 and gradually enters the upper wiring space 220 by the turning of the screw 1 (the turning of the screw 1 is generally referred to as upward turning in this process), the distance between the wire frame 2 and the wiring board 3 fixedly disposed at the top of the lower wiring space 230 is reduced, and the opening through which the wire can be inserted is also reduced. Conversely, when the screw 1 is screwed down, the wire frame 2 is withdrawn from the upper wire connection space 220.

In this embodiment, a buffer structure is provided above the screw 1 and near an opening of a communication hole formed by the upper wiring space 220 communicating with the outside, and as a preferred structure, as shown in fig. 3, the buffer structure is a semi-annular structure formed by surrounding three arc-shaped sheet bodies 210 at intervals. The arc-shaped sheet body 210 is made of plastic sheets and has certain elasticity, and the thickness of the arc-shaped sheet body can be set to be 0.3 mm-1.2 mm. In this embodiment, the arc-shaped sheet 210 is fixed near the opening at the outer side and can swing at the inner side relative to the outer side. As shown in fig. 4, the sheet body has a first shape and a second shape, the first shape is a natural state in which the sheet body is placed before, without or just before the screw 1 is screwed into the non-screw tooth and the sheet body collides with the screw 1 to generate a contact force, and the second shape is a forced tilting state in which the screw 1 is pressed so as not to be separated from the screw hole of the wire frame 2 when the screw 1 is screwed into the non-screw tooth. When the screw 1 is continuously screwed upwards, the inner side of the arc-shaped sheet body 210 swings from the horizontal state as shown in the left side of fig. 4 to the inclined state as shown in the right side of fig. 4. At the same time the top of the screw 1 also rises from the first configuration to the height of the second configuration and eventually the screw 1 does not move further upwards due to the interference force of the second configuration.

The position change from the first mode to the second mode is more intuitive and clearer as shown in fig. 5.

In order to keep the arc-shaped sheet body 210 in contact with the top of the screw 1 during the swinging process, the inner diameter of the arc-shaped sheet body 210 is preferably determined according to the size of the screw 1 used and the position state of the screw 1 when the screw is screwed to a non-thread, and generally, the inner diameter of the arc-shaped sheet body 210 needs to be larger than the diameter of the top of the screw 1 and can be 10-14 mm.

Further, in practical use, the perpendicular distance in the extending direction of the upper wiring space 220, i.e., the vertical direction shown in fig. 4, between the first form and the second form is generally not less than 1mm and not more than 1.4 mm. For example, 1-32A miniature circuit breakers are 1mm, and 40A-64A miniature circuit breakers are 1.2mm or 1.4 mm; the thickness can be designed to be 1.1mm, 1.3mm and the like according to actual use requirements.

Of course, considering that the buffer structure in this embodiment uses a plastic sheet with a single side fixed and a swinging suspended side, in order to fix the second form, a limit structure may be further disposed above the buffer structure, and the limit structure and the buffer structure are disposed in parallel and spaced adjacent to each other. In this embodiment, it sets up one section of spacing flange 110 for following the opening border of the external open-ended that upper wiring space 220 and external intercommunication seted up, the casing thickness of spacing flange 110 department is greater than buffer structure, and the intercommunicating pore aperture on spacing flange 110 is less than the aperture that the outside of arc lamellar body 210 corresponds among the buffer structure, and is greater than the internal diameter of the inboard department of arc lamellar body 210, thereby make spacing flange 110 can block between the swing scope of the inboard of arc lamellar body 210 swing under the parallel spaced condition of buffer structure with arc lamellar body 210 formation and restrict the swing range of the inboard of arc lamellar body 210, realize the immobilization, the stabilization of second form.

In the embodiment, the upper wiring space 220 and the lower wiring space 230 are equally disposed in the first housing 100 and the second housing 200 that can be closed and sealed, the buffer structure is disposed on the first housing 100, and the limiting structure is disposed on the second housing 200. The structure can simplify the structure of the first shell 100 and the second shell 200, thereby facilitating the manufacture and processing of the die of the first shell 100 and the second shell 200 and helping to reduce the processing cost.

In addition, for convenience of processing, the buffer structure is preferably integrally formed with the first housing 100, and the position-limiting structure is also preferably integrally formed with the second housing 200.

Example 2 this example differs from example 1 in that: in this embodiment, the buffering structure and the limiting structure are disposed on the first housing 100, and the upper wiring space 220 and the lower wiring space 230 are also divided into two parts and disposed on the first housing 100 and the second housing 200 that can be closed and sealed.

Example 3 this example differs from example 1 in that: in this embodiment, the limiting structure is a radial protrusion disposed along a half-circumference of the top opening of the upper wiring space 220 and corresponding to the plastic sheet.

Embodiment 4 this embodiment provides a circuit breaker, which includes a connection terminal, a first housing 100, and a second housing 200, as shown in fig. 2, a lower connection space 230 and an upper connection space 220 are respectively disposed at about 1/2 at the left and right ends of the first housing 100 and the left and right ends of the second housing 200, when the first housing 100 and the second housing 200 are mated, the lower connection space 230 at about 1/2 at the left and right ends and the upper connection space 220 at about 1/2 are mated to form a complete and closed lower connection space 230 and upper connection space 220. The wiring terminal comprises a wiring frame 2, a screw 1 and a wiring board 3, wherein the wiring frame 2 is installed in the lower wiring space 230, the screw 1 is assembled in the upper wiring space 220, the tail end of the screw 1 is in threaded connection with a threaded hole of the wiring frame 2, the head end of the screw faces upwards, and the top opening of the upper wiring space 220 is communicated with the outside through the upper wiring space 220. When the screw 1 is screwed to the connection frame 2, its head end is in clearance-free fit with the first form of the plastic sheet.

When the screw 1 is continuously screwed up in the using process, the state that the head end of the screw is in clearance-free fit with the other side of the plastic sheet is transited to the state that the head end of the screw is in contact fit with the other side of the plastic sheet, and further, when the screw 1 rises in the screwing-up process of the screw 1 and reaches the second form of the plastic sheet, the screw 1 cannot rise any more and cannot be screwed any more.

To sum up, the utility model provides a simple structure, be convenient for binding post's that realizes mounting structure and circuit breaker thereof sets up the buffer structure that restricts its rising through screw 1 in binding post, can keep screw 1 to keep screw thread fit state and can not appear transitionally screwing on with the screw hole of wiring frame 2 all the time, improves the reliability that binding post used, prolongs the life of product.

Claims (10)

1. A mounting structure of a connection terminal, comprising a wiring space for accommodating a wiring frame, a wiring board and screws, the wiring board being inserted from the outside of the wiring frame to be located in a frame groove of the wiring frame, the wiring frame being driven by screwing the screws to move in the wiring space adjustably with a space between the wiring boards in clearance fit with the wiring frame, characterized in that: the wiring space is provided with a buffer structure on one side of the external opening: the buffer structure has a first shape which can generate a resisting force when the screw is in contact with the screw before being screwed to the screwless teeth, and a second shape which can press the screw to prevent the screw from being separated from the threaded hole of the wire connecting frame when the screw moves from the screwless teeth to the screwless teeth.

2. The mounting structure of a connection terminal according to claim 1, wherein: the distance between the first form and the second form in the moving direction of the wire frame is not less than 1mm and not more than 1.4 mm.

3. The mounting structure of a connection terminal according to claim 1, wherein: the buffer structure comprises at least one sheet body with one fixed side and the other swingable side, wherein the sheet body is in a first form when not stressed, and the swingable side of the sheet body deforms from the first form to a second form when stressed.

4. A mounting structure of a connection terminal according to claim 3, wherein: the sheet body is a plastic sheet.

5. The mounting structure of the connection terminal according to claim 3 or 4, wherein: the buffer structure is arranged at an external opening of the wiring space.

6. The mounting structure of a connection terminal according to claim 5, wherein: the buffer structure and the shell structure forming the wiring space are integrally formed.

7. The mounting structure of the connection terminal according to claim 3 or 4, wherein: the external opening is provided with a limiting structure, and the limiting structure is closer to the outside than the buffer structure and is used for limiting the tilting angle of the other side of the sheet body to form a second form of the buffer structure.

8. The mounting structure of a connection terminal according to claim 7, wherein: the limiting structure is a limiting bulge or a limiting flange arranged along the edge of the external opening.

9. The mounting structure of a connection terminal according to claim 7, wherein: the wiring space is formed by covering two shells relatively, and the limiting structure and the buffer structure are arranged on different shells.

10. A circuit breaker, characterized by: a mounting structure including the connection terminal according to any one of claims 1 to 9, and a connection terminal including a terminal frame, a screw, and a terminal block, the terminal frame being mounted in the terminal space; the threaded rod part of the screw is in threaded connection with the wiring frame, the adjusting cap part of the screw is opposite to the outward opening of the wiring space, and when the screw is in threaded connection with the wiring frame, the head end of the screw is in clearance fit or contact fit with the first form of the buffer structure.

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