An improved proximity switch

Abstract

This utility model discloses an improved proximity switch, which includes a housing. A front cover is movably plugged into one end of the housing, and a rear cover is movably plugged into the other end. An insulating cylinder is fitted inside the rear cover, and a support base and a pre-fixed insulating sleeve are sequentially fitted inside the rear cover. A circuit board passes through the inner hole of the pre-fixed insulating sleeve, and its output terminal is electrically connected to an electrical interface fixed on the support base. This utility model achieves contactless, automated, and precise calibration of the resistance value by independently laser-adjusting the core module, consisting of the insulating cylinder, pre-fixed insulating sleeve, and circuit board, in an open environment before final packaging. This not only completely eliminates the thermal shock and human error caused by manual soldering and adjustment, but also ensures high precision and ultra-high consistency in the detection distance of each product.

Description

Technical Field

[0001] This utility model relates to the field of proximity switch technology, and in particular to an improved proximity switch of model M5. Background Technology

[0002] In the field of industrial automation, the detection accuracy and product consistency of M5 proximity switches are crucial. Currently, this type of sensor mainly adopts a one-piece stainless steel housing structure. This structural design necessitates a production process of "first overall packaging, then internal debugging";

[0003] However, this inherent structure has a fundamental flaw: it is completely incompatible with the requirements of modern high-precision laser automatic calibration processes. Advanced processes such as laser trimming require open, interference-free, and precise access and manipulation of core resistive components on the circuit board during production to achieve consistent product parameters. However, the traditional integrated casing creates an irreversible "black box" after encapsulation, physically isolating any automated precision equipment from direct operation of the internal components.

[0004] Therefore, this contradiction between structural and technological aspects directly leads to the inability of existing technologies to guarantee the accuracy and consistency of products through automated calibration at the source, forcing production to rely on manual adjustments with low accuracy and poor consistency, thus constituting a core obstacle to the technological development in this field. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] To address the aforementioned problems, this utility model provides the following technical solution: An improved proximity switch includes a housing, one end of which is movably pluggable to a front cover, and the other end of which is movably pluggable to a rear cover. An insulating cylinder is fitted inside the rear cover, and a support base and a pre-fixed insulating sleeve are sequentially fitted inside the rear cover. A circuit board passes through the inner hole of the pre-fixed insulating sleeve, and its output end is electrically connected to an electrical interface fixed on the support base.

[0007] As a preferred embodiment of the improved proximity switch of this utility model, the housing has a first adapter cavity and a second adapter cavity at its two ends, one end of the front cover is movably inserted into the second adapter cavity, and one end of the rear cover is movably inserted into the first adapter cavity.

[0008] In a preferred embodiment of the improved proximity switch described in this utility model, the rear cover is inserted into the first adapter cavity to form a third adapter cavity, and the front cover is inserted into the second adapter cavity to form a fourth adapter cavity.

[0009] As a preferred embodiment of the improved proximity switch of this utility model, the front cover is provided with an insulating pad at one end inside the housing, and a groove is formed on the insulating pad, with one end of the circuit board being expanded and connected to the groove.

[0010] In a preferred embodiment of the improved proximity switch described in this utility model, the inner wall of the insulating cylinder is provided with a sliding groove, and the circuit board is slidably secured inside the insulating cylinder.

[0011] In a preferred embodiment of the improved proximity switch described in this utility model, the support base is expanded and sleeved inside the insulating cylinder.

[0012] The beneficial effects of this utility model are: by performing independent laser trimming on the core module consisting of an insulating cylinder, a pre-fixed insulating sleeve, and a circuit board in an open environment before final packaging, non-contact, automated precision calibration of the resistance value is achieved. This not only completely eliminates the thermal shock and human error caused by manual soldering and debugging, but also ensures high precision and ultra-high consistency of the detection distance for each product. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0014] Figure 1 This is a perspective view of the entire embodiment.

[0015] Figure 2 This is an example. Figure 1 The first 3D view of the interior.

[0016] Figure 3 This is an example. Figure 1 The second part of the internal 3D view.

[0017] Figure 4 This is an example. Figure 1 The third 3D view inside.

[0018] Figure 5 This is an example. Figure 1 The fourth part of the interior is shown in a three-dimensional view.

[0019] Figure 6This is an example. Figure 1 A cross-sectional view of the inner shell.

[0020] Figure 7 This is an example. Figure 1 Cross-sectional structural diagram.

[0021] In the figure; outer shell 100, first adapter cavity 100a, second adapter cavity 100b, third adapter cavity 100c, fourth adapter cavity 100e, front cover 101, insulating pad 101a, groove 101a-1;

[0022] Back cover 102, support base 102a, insulating cylinder 103, pre-fixed insulating sleeve 104, circuit board 105. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] Example

[0027] Reference Figures 1 to 7 This embodiment of the present invention provides an improved proximity switch, including a housing 100. One end of the housing 100 is movably plugged into a front cover 101, and the other end is movably plugged into a rear cover 102. An insulating cylinder 103 is sleeved inside the rear cover 102, and a support base 102a and a pre-fixed insulating sleeve 104 are sequentially sleeved inside the rear cover 102. A circuit board 105 passes through the inner hole of the pre-fixed insulating sleeve 104, and its output end is electrically connected to an electrical interface fixed on the support base 102a.

[0028] Specifically, the proximity switch includes a stainless steel housing 100 as the main protective structure. The housing 100 is a cylindrical structure with openings at both ends. Its front end is detachably provided with a front cover 101 by means of interference fit or threaded connection, and its rear end is detachably provided with a rear cover 102 in the same or similar manner. The detachable design of this housing 100 is the key structural basis for achieving high-precision calibration in this embodiment.

[0029] An insulating cylinder 103 is fitted inside the rear cover 102. Inside the insulating cylinder 103, a support base 102a and a pre-fixed insulating sleeve 104 are sequentially fitted along the axial direction. The support base 102a is used to fix the electrical interface of the external connector. A circuit board 105 carrying the core signal processing circuit passes through the inner hole of the pre-fixed insulating sleeve 104, receiving effective support and insulation fixation. The output end of the circuit board 105 is electrically connected to the electrical interface fixed on the support base 102a via wires or connectors, thereby outputting the detection signal.

[0030] During assembly, the inductor coil, circuit board 105 and its key resistive components are first pre-assembled with the internal structure such as insulating cylinder 103 and pre-fixed insulating sleeve 104 in an open environment to form a core module. At this stage, the resistors in the module are precisely calibrated without contact using a laser trimming machine to ensure that the detection distance reaches the preset accuracy. After calibration, the calibrated core module is installed as a whole into the stainless steel shell 100, and the front cover 101 and the rear cover 102 are installed in sequence for final sealing. Finally, electronic potting compound is injected into the interior to form all-round protection.

[0031] For example, the outer shell 100 has a first adapter cavity 100a and a second adapter cavity 100b at its two ends respectively. One end of the front cover 101 is movably inserted into the second adapter cavity 100b, and one end of the rear cover 102 is movably inserted into the first adapter cavity 100a, so as to facilitate the injection of electronic potting compound later and leave a permeable space to achieve complete fixation of the front and rear covers.

[0032] For example, the rear cover 102 is inserted into the first adapter cavity 100a to form the third adapter cavity 100c, and the front cover 101 is inserted into the second adapter cavity 100b to form the fourth adapter cavity 100e. The first to fourth adapter cavities facilitate the penetration of electronic potting compound, so that the circuit board 105 and the support base 102a and other devices are completely integrated with the electronic potting compound to achieve a stable and vibration-resistant effect.

[0033] For example, the front cover 101 is provided with an insulating pad 101a at one end inside the housing 100. The insulating pad 101a has a groove 101a-1. One end of the circuit board 105 is expanded and connected to the groove 101a-1. The inner wall of the insulating cylinder 103 is provided with a sliding groove. The circuit board 105 is slidably locked inside the insulating cylinder 103. The support base 102a is expanded and sleeved inside the insulating cylinder 103. Through the expansion connection between the front cover 101 and the support base 102a and the sliding groove on the inner wall of the insulating cylinder 103, it is more convenient to complete the calibration of the core module and the subsequent installation into the housing 100 and electronic potting compound, thereby improving the production efficiency of the proximity switch assembly.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An improved proximity switch, characterized in that: The device includes a housing (100), one end of which is movably plugged in and has a front cover (101), and the other end is movably plugged in and has a rear cover (102). An insulating cylinder (103) is fitted inside the rear cover (102), and a support base (102a) and a pre-fixed insulating sleeve (104) are sequentially fitted inside the cylinder. A circuit board (105) passes through the inner hole of the pre-fixed insulating sleeve (104), and its output end is electrically connected to an electrical interface fixed on the support base (102a).

2. The improved proximity switch as described in claim 1, characterized in that: The outer shell (100) has a first adapter cavity (100a) and a second adapter cavity (100b) at its two ends respectively. One end of the front cover (101) is movably inserted into the second adapter cavity (100b), and one end of the rear cover (102) is movably inserted into the first adapter cavity (100a).

3. The improved proximity switch as described in claim 2, characterized in that: The rear cover (102) is inserted into the first adapter cavity (100a) to form a third adapter cavity (100c), and the front cover (101) is inserted into the second adapter cavity (100b) to form a fourth adapter cavity (100e).

4. The improved proximity switch as described in claim 2, characterized in that: The front cover (101) is provided with an insulating pad (101a) at one end inside the outer shell (100). A groove (101a-1) is provided on the insulating pad (101a). One end of the circuit board (105) is expanded to the groove (101a-1).

5. The improved proximity switch as described in claim 1, characterized in that: The inner wall of the insulating cylinder (103) is provided with a sliding groove, and the circuit board (105) is slidably locked inside the insulating cylinder (103).

6. The improved proximity switch as described in claim 1, characterized in that: The support base (102a) is expanded and sleeved inside the insulating cylinder (103).

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