Fuse with limiting effect

Abstract

The utility model discloses a fuse with a limiting effect, which is characterized in that a shell is provided with a cavity, and the cavity is provided with an opening, a first sliding chute and a second sliding chute; protruding blocks are arranged on the two sides of the drawing piece, the protruding blocks slide in cooperation with the first sliding grooves, the drawing piece is provided with a cam part, the cam part slides in cooperation with the second sliding grooves, and the cam part is in interference fit with the opening. During the drawing action, the cam part crosses the opening and slides out of the shell; according to the structure, when the fusion tube needs to be replaced, the drawing piece performs drawing action, at the moment, the convex block moves along the first sliding groove, the cam part moves along the second sliding groove, the cam part crosses the opening and slides out of the shell, and due to the fact that the cam part is in interference fit with the opening, the fusion tube can be replaced under the action of gravity or other slight mistaken touch. Therefore, the cam part is prevented from crossing the opening to enter the cavity, so that the limiting effect is realized, and the drawing piece is prevented from entering the cavity for the second time to influence replacement of the fusion tube.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a fuse with a limiting effect. Background Art

[0002] The fuse includes a drawer and a shell. The shell is provided with a chamber. The drawer is partially located in the chamber, and the rest of the drawer is located outside the chamber. The drawer is pulled relative to the shell. In the prior art, the fuse tube cooperates with the drawer to achieve melting and cooperate with the conductive member accommodated in the chamber by pulling, thereby achieving electrical connection or electrical disconnection. When the fuse tube is damaged, it is replaced by pulling the drawer.

[0003] However, in the actual replacement process, since the drawer and the shell are matched in a sliding groove, when the drawer is pulled to the limit position, there is no limit structure between the drawer and the shell. The drawer is partially slid into the chamber again under the action of gravity or by accidental contact with external force, which requires a second operation and affects the replacement rate of the melting tube. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is how to prevent the drawer from falling into the fuse after being drawn out. To this end, a fuse with a limiting effect comprises:

[0005] A shell, wherein the shell is provided with a chamber, wherein the chamber is provided with an opening, a first slide groove, and a second slide groove;

[0006] A drawer, wherein protrusions are provided on both sides of the drawer, and the protrusions slide in cooperation with the first slide groove; the drawer is provided with a cam portion, and the cam portion slides in cooperation with the second slide groove, and the cam portion and the opening are interference fit;

[0007] During the pulling action, the cam portion slides over the opening to the outside of the housing.

[0008] The opening is provided with a necking portion, and the cam portion and the necking portion are in interference fit.

[0009] The chamber is provided with a protrusion, the number of the protrusion is one or two or a combination of more, and the protrusion cooperates with the opening to form the necking portion.

[0010] The top surface of the protrusion is coplanar with the top surface of the opening.

[0011] The drawer is provided with a reinforcing rib, and the reinforcing rib is connected to the cam portion.

[0012] The drawer is provided with two drawer grooves, and a partition is provided between the two drawer grooves.

[0013] The partition plate is provided with a through hole, and the through hole communicates with the two drawing grooves.

[0014] The drawer is provided with an indication mark.

[0015] The drawer is provided with a fixing cavity for fixing the melting tube, and an elastic clamp is provided at one end of the fixing cavity.

[0016] The number of the elastic clamps is two, and the two elastic clamps are respectively arranged on the upper and lower sides of one end of the fixing cavity, and the two elastic clamps face oppositely.

[0017] The technical solution of the utility model has the following advantages:

[0018] 1. The utility model provides a fuse with a limiting effect. With this structure, when the fuse tube needs to be replaced, the pull-out piece performs a pulling action. At this time, the protrusion moves along the first slide groove, and the cam portion moves along the second slide groove. The cam portion will slide across the opening to the outside of the shell. Since the cam portion and the opening are interference fit, gravity or other slight accidental touches will not cause the cam portion to cross the opening and enter the chamber, thereby achieving a limiting effect and preventing the pull-out piece from entering the chamber for a second time, affecting the replacement of the fuse tube.

[0019] 2. The utility model provides a fuse with a limiting effect, which forms a limiting effect through the interference fit between the cam part and the necking part. In addition, the interference fit can also be formed by increasing the size of the cam part.

[0020] 3. The utility model provides a fuse with a limiting effect, which forms a necking portion through the cooperation of the protrusions, thereby achieving an interference fit between the cam portion and the necking portion.

[0021] 4. The utility model provides a fuse with a limiting effect, which is arranged on the same plane, making it more convenient to process and reducing the difficulty of processing.

[0022] 5. The utility model provides a fuse with a limiting effect, which increases the strength of the cam part by reinforcing ribs to prevent it from breaking during the sliding process.

[0023] 6. The utility model provides a fuse with a limiting effect, and the setting of the pull-out groove is convenient for operators to operate.

[0024] 7. The utility model provides a fuse with a limiting effect. The setting of the through hole is more conducive to the operation of the operator. When multiple fuses are fixed side by side, the two adjacent fuses are tightly fitted, and it is difficult for the operator to use his fingers to gain leverage. At this time, the fuses can be pulled out through the through hole.

[0025] 8. The utility model provides a fuse with a limiting effect, and the indicator mark is used to indicate the installation direction of the fuse tube, so that the installation direction of the fuse tube will not be wrong. Here, the indicator mark can be one or a combination of two or more of a pattern, a symbol, and a word.

[0026] 9. The utility model provides a fuse with a limiting effect. The setting of the elastic clamp makes the fuse tube more firmly and stably fixed.

[0027] 10. The utility model provides a fuse with a limiting effect, in which the two elastic clips face in different directions, thereby forming a better clamping and fixing effect, so that the fuse tube is fixed more firmly and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of a fuse with a limiting effect provided by the utility model;

[0030] Figure 2 A cross-sectional view of the fuse provided by the utility model after being pulled out;

[0031] Figure 3 A cross-sectional view of the fuse provided by the utility model after being pulled out;

[0032] Figure 4 A schematic diagram of the structure of the drawer provided by the utility model;

[0033] Figure 5 This is a structural schematic diagram of the shell provided by the utility model.

[0034] Description of reference numerals:

[0035] 11. Shell; 12. Pull-out piece; 111. Chamber; 112. Opening; 113. First slide groove; 114. Second slide groove; 115. Narrowing portion; 116. Protrusion; 121. Bump; 122. Cam portion; 123. Reinforcing rib; 124. Fixed cavity; 125. Pull-out groove; 126. Partition; 127. Through hole; 128. Indicator mark; 129. Elastic clip. DETAILED DESCRIPTION

[0036] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] This embodiment provides a fuse with a limiting effect, as shown in the attached Figure 1-5 As shown, including:

[0042] The housing 11 is provided with a chamber 111, and the chamber 111 is provided with an opening 112, a first slide groove 113 and a second slide groove 114. The opening 112 is facing the upper opening 112, and the pull-out member 12 extends from the upper side through the opening 112 into the chamber 111, thereby realizing the pulling action. The first slide groove 113 is arranged vertically and longitudinally downward, and the number of the first slide grooves 113 can be adjusted according to actual needs. In this embodiment, the number of the first slide grooves 113 is four, two by two, and the two groups of first slide grooves 113 are arranged at positions near both sides of the chamber 111. Specifically, the housing 11 is composed of two parts, and one part is provided with two first slide grooves 113, so the two parts have four first slide grooves 113, two by two, forming two groups. It should also be noted here that the top of the first slide groove 113 will not penetrate to the outside of the housing 11, forming a limiting effect. The number of the second slide grooves 114 can also be adjusted according to actual needs, which can be one, two, or more. The second slide groove 114 is located between the two first slide grooves 113. In this embodiment, there are two second slide grooves 114, and the two second slide grooves 114 cooperate to form a group, that is, one component is provided with one second slide groove 114, and the two second slide grooves 114 are symmetrically arranged front and back.

[0043] The drawer 12, part of the drawer 12 extends into the chamber 111, and part of the drawer 12 is located outside the chamber 111. The drawer 12 is provided with protrusions 121 on both sides, where the protrusions 121 extend horizontally and laterally outward toward the corresponding two sides, that is, the protrusion 121 on the left side extends horizontally and laterally toward the left side, and the protrusion 121 on the right side extends horizontally and laterally toward the right side. The two protrusions 121 slide in the corresponding first slide groove 113. Due to the top limit of the first slide groove 113, when the protrusion 121 slides to the top of the first slide groove 113, a limit is formed. At this time, the drawer 12 cannot be separated from the housing 11 as a whole, forming two independent parts, ensuring that the drawer 12 is always matched with the housing 11. The drawer 12 is provided with a cam portion 122, which is in the shape of a cam. In this embodiment, the number of the cam portion 122 is described as only one, and the two sides of the cam portion 122 are respectively matched with the two second slide grooves 114, thereby forming the effect that the cam portion 122 slides on the second slide groove 114. The cam portion 122 and the opening 112 are interference fit, and the interference fit specifically refers to that the width of the cam portion 122 is greater than the width of the opening 112. Here, the width of the cam portion 122 is a few more than the width of the opening 112, which can be 1 thread, or 2 threads, or other parameters, and those skilled in the art can adjust according to actual needs. Here, it is only necessary to ensure that under gravity or other slight accidental touch forces, the cam portion 122 will not cross the opening 112 and enter the chamber 111. There is a correlation between the width difference and the force, and those skilled in the art can adjust it.

[0044] During the pulling action, the cam portion 122 slides over the opening 112 to the outside of the housing 11. With this structure, when the melting tube needs to be replaced, the pull-out member 12 performs a pulling action, at which time the protrusion 121 moves along the first slide groove 113, and the cam portion 122 moves along the second slide groove 114, and the cam portion 122 slides over the opening 112 to the outside of the housing 11. Since the cam portion 122 and the opening 112 are interference fit, gravity or other slight accidental touches will not cause the cam portion 122 to cross the opening 112 and enter the chamber 111, thereby achieving a limiting effect, preventing the pull-out member 12 from entering the chamber 111 for a second time, affecting the replacement of the melting tube.

[0045] Specifically, as attached Figure 1-5 As shown, the opening 112 is provided with a constricted portion 115, and the width of the constricted portion 115 is smaller than the width of the remaining positions of the opening 112. The cam portion 122 and the opening are in interference fit. The interference fit between the cam portion 122 and the constricted portion 115 forms a limiting effect. In addition, the size of the cam portion 122 can also be increased, and the position of the opening 112 is equal everywhere, so that the cam portion 122 and the opening 112 form an interference fit.

[0046] Specifically, as attached Figure 1-5 As shown, the chamber 111 is provided with a protrusion 116, and the number of the protrusions 116 is one or two or more combinations, that is, when the number of the protrusions 116 is one, the effect of reducing the opening 112 is formed; when the number of the protrusions 116 is two, the two protrusions 116 are symmetrically arranged, and the two protrusions 116 cooperate to form the effect of reducing the opening 112; it can also be a combination of multiple protrusions 116. Further, the protrusion 116 facing the side of the chamber 111 can also be a guide surface, such as an arc surface or an inclined surface, which can make the cam portion 122 better pass over the protrusion 116. The protrusion 116 cooperates with the opening 112 to form the constriction portion 115. The constriction portion 115 is formed by the cooperation of the protrusion 116, thereby achieving an interference fit between the cam portion 122 and the constriction portion 115. In this embodiment, the number of the protrusions 116 is two, and the two protrusions 116 are arranged on opposite sides. It should also be noted that the length of the protrusion 116 can be adjusted according to actual needs, and the width of the protrusion 116 can also be adjusted according to actual needs.

[0047] Specifically, the top surface of the protrusion 116 is coplanar with the top surface of the opening 112. The coplanar arrangement makes processing more convenient and reduces processing difficulty.

[0048] Specifically, as attached Figure 4 As shown, the drawer 12 is provided with a reinforcing rib 123, and the reinforcing rib 123 is connected to the cam portion 122. The reinforcing rib 123 increases the strength of the cam portion 122 to prevent it from breaking during the sliding process. In this embodiment, the reinforcing rib 123 is connected to the left and right sides of the cam portion 122 respectively.

[0049] Specifically, as attached Figure 1-5 As shown, the cam portion 122 is a structure that is larger at the top and smaller at the bottom, that is, the size of the upper end of the cam portion 122 is larger than the size of the lower end of the cam portion 122. Therefore, as long as the upper end of the cam portion 122 passes over the necking portion 115, so that the cam portion 122 extends to the outside of the chamber 111, the limiting effect of the cam portion 122 can be achieved. It should also be noted here that the middle of the chamber 111 is a concave structure, so that the height of the middle of the chamber 111 is less than the height of the two sides. Therefore, when the protrusion 121 and the first slide groove 113 slide to the top, the cam portion 122 also extends out of the chamber 111. Here, the cam portion 122 is specifically located below the fixed cavity 124, that is, the cam portion 122 is located in the middle area at the bottom of the entire drawer 12.

[0050] Specifically, as attached Figure 1-5 As shown, the drawer 12 is provided with two drawer slots 125, the two drawer slots 125 are arranged front and back, and a partition 126 is arranged between the two drawer slots 125. The arrangement of the drawer slots 125 is convenient for the operator to operate.

[0051] Specifically, as attached Figure 1-5 As shown, the partition 126 is provided with a through hole 127, and the through hole 127 communicates with the two drawing slots 125. The provision of the through hole 127 is more conducive to the operation of the operator. When multiple fuses are fixed side by side, the two adjacent fuses are closely fitted, and it is difficult for the operator's fingers to gain leverage. At this time, the fuses can be drawn through the through hole 127. The size, shape, and number of the through hole 127 can be adjusted according to actual needs.

[0052] Specifically, the drawer 12 is provided with an indicator mark 128. The indicator mark 128 is used to indicate the installation direction of the fusion tube so that the installation direction of the fusion tube will not be wrong. Here, the indicator mark 128 can be one or a combination of two or more of a pattern, a symbol, and a text. The indicator mark 128 is located between the drawer groove 125 and the fixing cavity 124. In this embodiment, the indicator mark 128 is a hole mark, that is, it forms an arrow shape.

[0053] Specifically, the drawer 12 is provided with a fixing cavity 124 for fixing the fusion tube, and the fixing cavity 124 is located below the drawing groove 125. An elastic clamp 129 is provided at one end of the fixing cavity 124, that is, one end of the fixing cavity 124 is fixed, and the other end is an elastic structure, so as to better achieve the fixing effect of the fusion tube. The setting of the elastic clamp 129 makes the fusion tube fixed more firmly and stably.

[0054] Specifically, there are two elastic clamps 129, which are disposed at the upper and lower sides of one end of the fixing cavity 124, and face opposite directions. The two elastic clamps 129 face in different directions, thus forming a better clamping and fixing effect, making the fuse tube more firmly and stably fixed.

[0055] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A fuse with limiting effect, characterized in that: include: A housing (11), wherein the housing (11) is provided with a chamber (111), and the chamber (111) is provided with an opening (112), a first slide groove (113), and a second slide groove (114); A drawer (12), wherein protrusions (121) are provided on both sides of the drawer (12), wherein the protrusions (121) slide in cooperation with the first slide groove (113), wherein the drawer (12) is provided with a cam portion (122), wherein the cam portion (122) slides in cooperation with the second slide groove (114), and wherein the cam portion (122) and the opening (112) are in interference fit; During the pulling action, the cam portion (122) slides across the opening (112) to the outside of the housing (11).

2. The fuse with limiting effect according to claim 1, characterized in that: The opening (112) is provided with a necking portion (115), and the cam portion (122) and the necking portion (115) are in interference fit.

3. The fuse with limiting effect according to claim 2, characterized in that: The chamber (111) is provided with a protrusion (116), the number of the protrusion (116) is one or two or a combination of more, and the protrusion (116) cooperates with the opening (112) to form the necking portion (115).

4. The fuse with limiting effect according to claim 3, characterized in that: The top surface of the protrusion (116) and the top surface of the opening (112) are arranged coplanarly.

5. The fuse with limiting effect according to claim 1, characterized in that: The drawer (12) is provided with a reinforcing rib (123), and the reinforcing rib (123) is connected to the cam portion (122).

6. The fuse with limiting effect according to claim 1, characterized in that: The drawer (12) is provided with two drawer grooves (125), and a partition (126) is provided between the two drawer grooves (125).

7. The fuse with limiting effect according to claim 6, characterized in that: The partition plate (126) is provided with a through hole (127), and the through hole (127) is connected to the two drawing grooves (125).

8. The fuse with limiting effect according to claim 1, characterized in that: The drawer (12) is provided with an indication mark (128).

9. The fuse with limiting effect according to claim 1, characterized in that: The drawer (12) is provided with a fixing cavity (124) for fixing the melting tube, and an elastic clamp (129) is provided at one end of the fixing cavity (124).

10. The fuse with limiting effect according to claim 9, characterized in that: The number of the elastic clamps (129) is two, and the two elastic clamps (129) are respectively arranged on the upper and lower sides of one end of the fixed cavity (124), and the two elastic clamps (129) face opposite directions.

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