Novel limit switch

Abstract

The utility model discloses a novel limit switch comprising a housing and a contact assembly, the housing is provided with a groove, and a positioning assembly used for fixing the contact assembly is integrally arranged in the groove; the wire is electrically connected with the contact assembly; and the sealing element is used for sealing the contact assembly in the groove. As the wire is connected to the contact assembly, and the sealing element seals the contact assembly in the groove, the connection part of the wire and the contact assembly is also sealed, and the overall waterproof performance is further improved. The positioning assembly is integrally arranged in the groove, production of a fixing base in the prior art can be omitted, and therefore the production cost is saved. In the assembling process, the contact assembly can be directly installed in the groove, installation of the fixing base is not needed, and the assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of limit switches, and more specifically to a novel limit switch. Background Art

[0002] A limit switch, also known as a travel switch or terminal switch, is a common electromechanical control element used to detect whether the moving parts of a mechanical device have reached a preset position or an extreme position, and send an electrical signal when reaching these positions, thereby achieving functions such as control, counting, positioning or safety protection.

[0003] The limit switch includes a housing, a sensor head, and a contact assembly. In the prior art, the contact assembly is mounted on a fixed seat, which is mounted in a groove on the back of the housing. A cover plate is then used to cover the exposed portion of the contact assembly, and a bolt is inserted into the cover plate to rest against the fixed contact sheet of the contact assembly. When connecting the wires, the wires are wound around the bolts and locked by rotating the bolts. It can be seen that the bolts of this structure are exposed and the waterproof effect is poor. The contact assembly is ultimately mounted in the groove, so the fixed seat is a component that increases the cost. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a

[0005] To solve the above problems, the utility model adopts the following technical solutions: A new type of limit switch, including a housing and a contact assembly, wherein the housing is provided with a groove, and a positioning assembly for fixing the contact assembly is integrally arranged in the groove; and further comprising a wire electrically connected to the contact assembly and a seal for sealing the contact assembly in the groove.

[0006] Preferably, a sensing portion is mounted on the housing, and the groove is provided on a side of the housing away from the sensing portion.

[0007] Preferably, the contact assembly includes a pressing sheet and a fixed contact sheet; the positioning assembly includes:

[0008] A first positioning member, installed in the groove, for fixing the pressing piece;

[0009] Four second positioning members are arranged and installed in the groove. The four second positioning members are located on both sides of the first positioning member in pairs, and the two second positioning components on the same side are arranged correspondingly at upper and lower intervals. The second positioning members are used to fix the contact piece.

[0010] Preferably, a vertically arranged first slot is provided on the first positioning member, and the pressing piece is arranged in the first slot.

[0011] Preferably, the second positioning member is provided with a second slot which is arranged transversely, and a through slot which is staggered and perpendicular to the second slot, and the fixed contact piece is arranged in the second slot.

[0012] Preferably, the second positioning member is composed of two bent connecting pieces, one end of the two connecting pieces being connected is a bent end, and the other ends are respectively connected to two adjacent inner walls of the groove.

[0013] Preferably, the sealing member may be a cover or a filler.

[0014] Preferably, a partition is transversely arranged in the groove to divide the groove into an upper half groove and a lower half groove, and the positioning assembly, the contact assembly and the sealing member are all located in the upper half groove.

[0015] Preferably, a branching cable groove is provided on the partition, and a main cable groove is provided at the bottom of the lower half groove.

[0016] Preferably, the contact assembly further comprises a movable contact sheet transversely mounted on the pressing sheet and a contact spring mounted on the movable contact sheet, and two ends of the movable contact sheet are located between second positioning members arranged upper and lower.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) Since the wire is connected to the contact assembly and the seal seals the contact assembly in the groove, the connection portion between the guide and the contact assembly is also sealed, thereby improving the overall waterproof performance.

[0019] (2) By integrally arranging the positioning assembly in the groove, the production of the fixing seat in the prior art can be eliminated, thereby saving production costs.

[0020] (3) During assembly, the contact assembly can be directly installed in the groove without the need to install the fixing seat, thereby improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the interior of the utility model after assembly;

[0023] Figure 3 for Figure 2 A magnified image of point A;

[0024] Figure 4 This is a schematic diagram of an unassembled contact assembly;

[0025] Figure 5 for Figure 4 Enlarged view of point B.

[0026] Description of the numbers in the figure:

[0027] 1. Shell; 2. Contact assembly; 21. Pressing sheet; 22. Fixed contact sheet; 23. Movable contact sheet; 24. Contact spring; 3. Groove; 31. Upper half groove; 32. Lower half groove; 4. Positioning assembly; 41. First positioning piece; 411. First card slot; 42. Second positioning piece; 421. Second card slot; 422. Through slot; 423. Connecting piece; 5. Partition; 51. Branching cable slot; 6. Main cable slot; 7. Induction unit; 8. Sealing piece; 9. Wire. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0029] refer to Figure 1-3 A novel limit switch includes a shell 1 and a contact assembly 2. The shell 1 is provided with a groove 3, and a positioning assembly 4 for fixing the contact assembly 2 is integrally arranged in the groove 3; it also includes a wire 9 electrically connected to the contact assembly 2 and a seal 8 that seals the contact assembly 2 in the groove 3. It can be understood that the integral arrangement of the positioning assembly 4 and the groove 3 can be integrally formed by a mold. The shell 1 has four faces except for the two ends, and the groove 3 can be provided on any of the four faces. In this way, during assembly, the contact assembly 2 can be directly installed on the positioning assembly 4 of the groove 3 without the use of a fixing seat, which reduces the cost, eliminates the installation steps of the fixing seat, and improves the assembly efficiency.

[0030] Optionally, in some embodiments, the housing 1 is provided with a sensing portion 7, and the groove 3 is provided on a side of the housing 1 away from the sensing portion 7. It can be understood that the sensing portion 7 is an operating head of a limit switch, and the operating head has various forms, such as a roller type, a rocker type, a button type, etc., to adapt to different use environments and requirements. The groove 3 is provided on a side of the housing 1 away from the sensing portion 7, and is staggered from the sensing portion 7, so that the entire structure position is rationalized and convenient processing.

[0031] Optionally, in some embodiments, reference Figure 2-5The contact assembly 2 includes a pressing piece 21 and a fixed contact piece 22; the positioning assembly 4 includes: a first positioning member 41, installed in the groove 3, used to fix the pressing piece 21; a second positioning member 42, four of which are installed in the groove 3, and the four second positioning members 42 are located on both sides of the first positioning member 41 in pairs, and the two second positioning members 4 on the same side are arranged in a corresponding manner at an upper and lower interval, and the second positioning members 42 are used to fix the fixed contact piece 22. It can be understood that the components of the contact assembly 2 are the prior art, and it also includes a movable contact piece 23 and a contact spring 24 installed transversely on the pressing piece 21. The specific structure can be referred to Figure 4 and Figure 5 , I will not elaborate on it here. The first positioning member 41 and the second positioning member 42 respectively fix the pressing sheet 21 and the fixed contact sheet 22, and a clamping structure, a bolt fixing structure, etc. can be adopted. Specifically, a vertically arranged first clamping slot 411 can be opened on the first positioning member 41, and the pressing sheet 21 is clamped in the first clamping slot 411. A horizontally arranged second clamping slot 421 and a staggered through slot 422 perpendicular to the second clamping slot 421 are opened on the second positioning member 42, and the fixed contact sheet 22 is clamped in the second clamping slot 421. Here, the two ends of the movable contact sheet 23 are located between the second positioning members 42 arranged up and down, and the two ends of the movable contact sheet 23 need to contact with the fixed contact sheet 22, so the opening of the through slot 422 can avoid the contact between the movable contact sheet 23 and the fixed contact sheet 22.

[0032] Optionally, in some embodiments, reference Figure 5 The second positioning member 42 is composed of two bent connecting pieces 423, one end of the two connecting pieces 423 connected is a bent end, and the other end is respectively connected to two adjacent inner walls of the groove 3. It can be understood that no matter whether the groove 3 is opened into a square structure, a pentagonal structure, or a hexagonal structure, it has a corner, and the corner is surrounded by two adjacent inner walls, and the second positioning member 42 is installed on the corner. The second slot 421 is opened on the horizontally arranged connecting piece 423. In this way, the second positioning member 42 can be installed more stably.

[0033] Optionally, in some embodiments, reference Figure 1 The seal 8 can be a cover or a filler. The cover can be fixed by bolts, colloids, etc., and the filler can be a product with fluidity and air-cured curing, such as liquid silicone, epoxy resin, UV curing sealant, acrylic sealant, polyurethane sealant, etc. After the contact assembly 2 is assembled, the filler is poured into the groove 3 and then air-dried and cured.

[0034] Optionally, in some embodiments, reference Figure 4-5, a partition 5 is transversely arranged in the groove 3 to divide the groove 3 into an upper half groove 31 and a lower half groove 32, and the positioning assembly 4, the contact assembly 2, and the sealing member 8 are all located in the upper half groove 31. Furthermore, a branch line arrangement groove 51 is provided on the partition 5, and a main line arrangement groove 6 is provided at the bottom of the lower half groove 32. It can be understood that after the multiple wires 9 are connected to the fixed tabs, they can be led out from the branch line arrangement groove 51 and then from the main line arrangement groove. The sealing member 8 can seal the upper half groove 31 and then fix the multiple wires 9 in the branch line arrangement groove 51. In this way, the orderliness of the wire arrangement can be improved.

[0035] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A novel limit switch, comprising a housing (1) and a contact assembly (2), characterized in that: The housing (1) is provided with a groove (3), in which a positioning assembly (4) for fixing the contact assembly (2) is integrally arranged; it also includes a wire (9) electrically connected to the contact assembly (2) and a sealing member (8) for sealing the contact assembly (2) in the groove (3).

2. A new limit switch according to claim 1, characterized in that: The housing (1) is provided with a sensing portion (7), and the groove (3) is provided on a side of the housing (1) facing away from the sensing portion (7).

3. A new limit switch according to claim 1, characterized in that: The contact assembly (2) comprises a pressing sheet (21) and a fixed contact sheet (22); the positioning assembly (4) comprises: A first positioning member (41) is installed in the groove (3) and is used to fix the pressing sheet (21); Four second positioning members (42) are arranged and installed in the groove (3). The four second positioning members (42) are located in pairs on both sides of the first positioning member (41), and the two second positioning components (4) on the same side are arranged in a corresponding manner at an upper and lower interval. The second positioning members (42) are used to fix the fixed contact piece (22).

4. A new limit switch according to claim 3, characterized in that: The first positioning member (41) is provided with a vertically arranged first slot (411), and the pressing sheet (21) is clamped in the first slot (411).

5. A new limit switch according to claim 3, characterized in that: The second positioning member (42) is provided with a second slot (421) arranged transversely, and through slots (422) interlaced perpendicular to the second slot (421), and the fixed contact piece (22) is arranged in the second slot (421).

6. A new limit switch according to claim 3, characterized in that: The second positioning member (42) is composed of two bent connecting pieces (423), one end of the two connecting pieces (423) being connected is a bent end, and the other ends are respectively connected to two adjacent inner walls of the groove (3).

7. A new limit switch according to claim 1, characterized in that: The sealing member (8) may be a cover or a filler.

8. A new limit switch according to claim 1, characterized in that: A partition (5) is disposed transversely in the groove (3) to divide the groove (3) into an upper groove (31) and a lower groove (32); the positioning assembly (4), the contact assembly (2) and the sealing member (8) are all located in the upper groove (31).

9. A new limit switch according to claim 8, characterized in that: The partition plate (5) is provided with a branching cable arrangement groove (51), and the bottom of the lower half groove (32) is provided with a main cable arrangement groove (6).

10. A new limit switch according to claim 1, characterized in that: The contact assembly (2) further comprises a movable contact sheet (23) transversely mounted on the pressing sheet (21) and a contact spring (24) mounted on the movable contact sheet (23), wherein both ends of the movable contact sheet (23) are located between second positioning members (42) disposed above and below.

Images