Sensor

Abstract

The utility model discloses a sensor which comprises a switching component, a shell, a temperature sensing component and a protective sleeve, the shell comprises a cavity, the protective sleeve is at least partially located in the cavity, the switching component is at least partially located in the cavity, the protective sleeve and the switching component are fixedly connected or in limited connection, the protective sleeve comprises a containing cavity, and the temperature sensing component is partially located in the containing cavity. The temperature sensing component comprises a temperature sensing element and a lead, the temperature sensing element is electrically connected with the lead, the temperature sensing element is located in the containing cavity, the lead comprises an extending part, the extending part extends out of the switching component and is located in the containing cavity, the protective sleeve comprises a sleeve bottom, the sleeve bottom comprises a first filtering hole, and the first filtering hole is communicated with the containing cavity. According to the sensor provided by the invention, the protective sleeve is provided, the temperature sensing element is located in the accommodating cavity of the protective sleeve, the sleeve bottom of the protective sleeve comprises the first filtering hole, and the first filtering hole can be communicated with the accommodating cavity, so that a medium directly enters the accommodating cavity of the protective sleeve through the first filtering hole.

Description

Technical Field

[0001] The utility model relates to the field of sensing technology, in particular to a sensor. Background Art

[0002] Sensors are an important component in industrial automation control systems. They are used to sense measured information and convert it into electrical signals or other required forms of output information according to certain rules. With the continuous development of science and technology, the application of sensors in daily life is becoming more and more extensive.

[0003] Figure 1A A schematic cross-sectional view of a sensor is provided as background technology. Figure 1B for Figure 1A A schematic cross-sectional view of the temperature sensing component from another direction. In this structure, the sensor includes a temperature sensing component, which includes a temperature sensing element 301, a lead 302, and an adapter 303. In this embodiment, to prevent short circuits in the lead 302, the temperature sensing element 301, lead 302, and adapter 303 are injection molded into an integrated structure, with the lead 302 encapsulated within the adapter 303. In actual use, this sensor structure, because the temperature sensing element 301 is also encapsulated within the connector 303, increases the temperature sensing time. Therefore, this structure has room for improvement. Utility Model Content

[0004] The utility model provides a sensor, including a transition component, a shell, a temperature sensing component, and a protective sleeve, wherein the shell includes a cavity, the protective sleeve is at least partially located in the cavity, the transition component is at least partially located in the cavity, the protective sleeve is fixedly connected or limit-connected to the transition component, the protective sleeve includes a accommodating cavity, the temperature sensing component is partially located in the accommodating cavity, the temperature sensing component includes a temperature sensing element and a lead, the temperature sensing element is electrically connected to the lead, the temperature sensing element is located in the accommodating cavity, the lead includes an extension portion, the extension portion extends from the transition component, the extension portion is located in the accommodating cavity, the protective sleeve includes a sleeve bottom, the sleeve bottom includes a first filter hole, and the first filter hole is connected to the accommodating cavity.

[0005] The sensor provided in the present application provides a protective cover, wherein the temperature sensing element is located in the accommodating cavity of the protective cover, and the bottom of the protective cover includes a first filter hole, which can be connected to the accommodating cavity, so that the medium can directly enter the accommodating cavity of the protective cover through the first filter hole. On the one hand, the first filter hole can filter impurities in the medium and reduce the risk of lead short circuit. On the other hand, the temperature sensing element can directly contact the medium, thereby shortening the temperature sensing time and improving the sensing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1A : A cross-sectional schematic diagram of a sensor in the background art;

[0007] Figure 1B : Figure 1A A schematic cross-sectional view of the temperature sensing component in another direction;

[0008] Figure 2 : A schematic cross-sectional view of a sensor provided by the present invention;

[0009] Figure 3 : Figure 2 A partial enlarged schematic diagram of point Ⅰ in the middle;

[0010] Figure 4 : Figure 2 Schematic diagram of the assembly cross section of the intermediate connection component, protective cover and temperature sensing component;

[0011] Figure 5A : Figure 4 A three-dimensional schematic diagram of the intermediate connecting component in one direction;

[0012] Figure 5B : Figure 4 A schematic cross-sectional view of the intermediate transfer component;

[0013] Figure 6 : Figure 2 a schematic cross-sectional view of the middle shell;

[0014] Figure 7A : A schematic diagram of a protective cover according to another embodiment of the present invention;

[0015] Figure 7B : A schematic diagram of a protective cover according to another embodiment of the present invention;

[0016] Figure 2-7B Explanation of symbols:

[0017] 2-core component, 21-circuit board, 22-core;

[0018] 3- adapter, 31- adapter seat, 311- base, 3111- mounting groove, 312- protrusion,

[0019] 3121-card slot, 32-first sealing member;

[0020] 4-housing, 41-first hole section, 42-second hole section, 43-first connecting section;

[0021] 5-temperature sensing component, 51-lead, 52-temperature sensing element;

[0022] 511- extension portion, 512- first lead, 513- second lead;

[0023] 6-protective sleeve, 61-sleeve bottom, 611-first filter hole, 612-first conductive portion;

[0024] 62-protection part, 621-second filter hole, 622-second conductive part,

[0025] 63-connecting part, 631-clamping part

[0026] 64-first protective cover, 65-second protective cover, 651-buckle, 66-accommodating cavity. DETAILED DESCRIPTION

[0027] In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. The directional words such as upper, lower, radial, and axial in this article are attached. Figure 2 The positions of the components shown in the figure are defined only for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application.

[0028] Figure 2 This is a cross-sectional schematic diagram of a sensor provided by the present invention. In this embodiment, the sensor includes an adapter component 3, a housing 4, a temperature sensing component 5, and a protective sleeve 6. The housing 4 includes a cavity, and the protective sleeve 6 is at least partially located in the cavity of the housing 4. The adapter component 3 is at least partially located in the cavity of the housing 4. The protective sleeve 6 is fixedly connected or position-limited to the adapter component 3. In the solution of the present application, the protective sleeve 6 and the adapter component 3 are connected by a concave-convex position-limiting connection via a concave portion and a convex portion. Of course, they can also be directly fixed and connected using glue, or threaded connection, etc. As long as all connection methods ensure that the protective sleeve 6 and the adapter component 3 can achieve fixed or position-limited cooperation, they should be within the scope of protection of the present application.

[0029] like Figure 4As shown, the protective sleeve 6 includes a accommodating cavity 66, and the temperature sensing component 5 is partially located in the accommodating cavity 66 of the protective sleeve 6. The temperature sensing component 5 includes a temperature sensing element 52 and a lead 51. The temperature sensing element 52 is electrically connected to the lead 51. The electrical connection here can also be achieved by welding or other connection methods. The purpose is to ensure that the temperature sensing element 52 and the lead 61 can be energized and fixed to each other. The temperature sensing element 52 is located in the accommodating cavity 66 of the protective sleeve 6, the lead 51 includes an extension portion 511, the extension portion 511 extends downward from the adapter component 3, and the extension portion 511 is located in the accommodating cavity 66 of the protective sleeve 6, the protective sleeve 6 includes a sleeve bottom 61, the sleeve bottom 61 includes a first filter hole 611, the first filter hole 611 connects the accommodating cavity 66 with the external space of the protective sleeve 6, that is, the medium in the external space can enter the accommodating cavity 66 through the first filter hole 611, and the temperature sensing element 52 is located in the accommodating cavity 66 of the protective sleeve 6. Therefore, on the one hand, the present application can filter impurities in the medium through the first filter hole 611, and on the other hand, the temperature sensing element 52 can directly contact the medium. The temperature sensing element 52 can directly sense the temperature of the medium, shorten the temperature sensing time, and improve the sensing speed.

[0030] like Figure 3 As shown, the protective sleeve 6 includes a first conductive portion 612 located at the sleeve bottom 61. The protective sleeve 6 is cylindrical, with one end being open and the other end being the sleeve bottom 61. The first conductive portion 612 includes one or more first filter holes 611. On a projection plane perpendicular to the axial direction of the protective sleeve 6, the projected area of ​​the first conductive portion 612 overlaps the projected area of ​​the temperature sensing element 52. This arrangement allows the medium to flow into the accommodating cavity 66 of the protective sleeve 6 through the first filter holes 611 in the sleeve bottom 61. Furthermore, the projected area of ​​the first conductive portion 612 overlaps the projected area of ​​the temperature sensing element 52, ensuring that the temperature sensing element 52 quickly and fully contacts the medium and senses the medium's temperature.

[0031] Furthermore, if Figure 2 、 Figure 4As shown, the protective sleeve 6 partially extends outside the cavity, and the sleeve bottom 61 is located outside the cavity. It should be noted that the protective sleeve 6 partially extends from the housing 4, and in particular, the first conductive portion 612 extends from the housing 4. This configuration allows the medium to flow into the accommodating cavity 66 of the protective sleeve 6 more quickly, accelerating the temperature sensing element 52 to quickly contact the medium and sense the temperature of the medium. The protective sleeve 6 also includes a protective portion 62 and a connecting portion 63. The connecting portion 63 is fixedly connected or positionally connected to the adapter component 3. One end of the protective portion 62 is connected to the connecting portion 63, and the other end of the protective portion 62 is connected to the sleeve bottom 61. The protective portion 62 includes a second conductive portion 622, which includes a second filter hole 621. The second filter hole 621 is connected to the accommodating cavity 66. It should be noted that the second conductive portion 622 is closer to the sleeve bottom 61 than the connecting portion 63. On a projection plane perpendicular to the radial direction of the protective sleeve 6, the projected area of ​​the second conductive portion 622 covers at least half the height of the projected area of ​​the sensing element 52. The second conductive portion 622 includes one or more second filter holes 621. The second conductive portion 622 is located on the circumferential sidewall of the protective sleeve 6, while the first conductive portion 612 is located on the sleeve bottom 61 of the protective sleeve 6. The second conductive portion 622 is disposed around the lateral side of the temperature sensing element 52, while the first conductive portion 612 is disposed relatively below the temperature sensing element 52. This arrangement allows the first and second conductive portions 612, 622 to nearly completely surround the temperature sensing element, allowing medium to flow into the accommodating cavity 66 of the protective sleeve 6 simultaneously from different directions. This further ensures that the temperature sensing element 52 is more fully exposed to the medium and can quickly sense the medium's temperature.

[0032] like Figure 2 、 Figure 3 As shown, the lead 51 includes a first lead 512 and a second lead 513. The protruding portion 511 includes the portion of the first lead 512 extending from the protrusion 312 and the portion of the second lead 513 extending from the protrusion 312. The minimum distance between the first lead 512 and the second lead 513 is defined as d. The aperture of the first filter hole 611 is defined as D1, and the aperture of the second filter hole 621 is defined as D2. Therefore, D1 is less than 1 / 2d, and D2 is less than 1 / 2d. It is easy to imagine that some metal impurities or other foreign matter will inevitably exist in the medium. The filter hole is provided to connect the medium, allowing the temperature sensing element 52 to directly contact the medium and accelerate the temperature sensing speed. It also filters impurities and foreign matter, preventing them from entering the receiving cavity 66. This is especially true for conductive metal impurities. If large impurities enter the receiving cavity 66, there is a risk of contacting and connecting the first and second leads 512 and 513, causing a short circuit failure.

[0033] The material of the protective sleeve 6 is an insulating material. The insulating material here can be PPS, nylon, etc., as long as it is non-conductive and has an insulating effect. It should be noted that the material of the shell 4 is metal, the material of the lead 51 is metal, and the material of the protective sleeve 6 is insulating. In the radial direction of the sensor, the protective sleeve (6) is located between the shell 4 and the lead 51. The insulating material protective sleeve 6 can effectively prevent the lead 51 from contacting the shell 4 and causing a short circuit. In the solution of this application, the protective sleeve 6 is formed as a whole by injection molding, and of course it can also be assembled in parts. Figure 7A As shown, the protective sleeve 6 includes a first protective sleeve 64 and a second protective sleeve 65, which are arranged in left and right parts. The first protective sleeve 64 and the second protective sleeve 65 are fixedly connected. As a specific embodiment, the first protective sleeve 64 and the second protective sleeve 65 do not require a separate assembly mechanism. In other words, the first protective sleeve 64 and the second protective sleeve 65 are two separate parts. In the radial direction of the protective sleeve 6, the protective sleeve 6 is at least partially located in the first hole section 41 of the housing 4. Therefore, the housing 4 has a limiting effect on the protective sleeve 6 in the circumferential direction, so that the first protective sleeve 64 and the second protective sleeve 65 will not separate radially. In the axial direction of the protective sleeve 6, the clamping portion 631 and the clamping groove 3121 are assembled in a concave and convex manner. Therefore, the adapter 31 has a limiting effect on the protective sleeve 6 in the axial direction. Of course, other assembly methods can also be used, such as glue, interference fit, etc., as long as the first protective sleeve 64 and the second protective sleeve 65 can be fixed. Figure 7B The figure shows another embodiment of the protective sleeve. The protective sleeve 6' includes a first protective sleeve 64' and a second protective sleeve 65' which are separated into upper and lower parts. The first protective sleeve 64' is provided with a groove and the second protective sleeve 65' is provided with a buckle 651. The first protective sleeve 64' and the second protective sleeve 65' are snap-connected and assembled into a complete protective sleeve 6' through the cooperation of the buckle 651 and the groove. Of course, the assembly method is not limited to the above scheme, which will not be repeated here.

[0034] like Figure 4 、 Figure 5A 、 Figure 5B As shown, the adapter component 3 includes an adapter seat 31, and the adapter seat 31 includes a base portion 311 and a protrusion 312. The protrusion 312 protrudes from one end of the base portion 311 toward the protective sleeve 6, and the protrusion 312 partially extends into the accommodating cavity 66 of the protective sleeve 6. The protrusion 312 is fixedly connected or limitedly connected with the connecting portion 63. In this embodiment, the outer wall of the protrusion 312 and the inner wall of the connecting portion 63, one of which includes a recess and the other includes a protrusion, and the protrusion 312 is connected to the connecting portion 63 in a recessed manner. In the solution of the present application, a slot 3121 is provided on the outer wall of the protrusion 312, and a snap-fitting portion 631 is provided on the connecting portion 63. The snap-fitting portion 631 of the connecting portion 63 is snapped into the slot 3121 of the protrusion 312, so that the two are snap-fitted and limited in the longitudinal direction of the protective sleeve 6.

[0035] like Figure 2 、 Figure 6 、 Figure 5B As shown, the housing 4 includes a first hole section 41, the protective portion 62 at least partially extends into the first hole section 41, and the outer wall of the protective portion 62 is clearance-matched with the inner wall of the first hole section 41. Figure 2 As shown, the sensor of the present application also includes a core component 2, which includes a circuit board 21 and a core 22. The core 22 is electrically connected to the circuit board 21. The base portion 311 includes a mounting groove 3111. The notch of the mounting groove 3111 faces the side away from the temperature sensing element 52, and the core 22 is located in the mounting groove 3111. It should be noted that one end of the lead 51 is electrically connected to the temperature sensing element 52, and the other end of the lead 51 is electrically connected to the circuit board 21. In this embodiment, there are two leads 51, and each lead 51 can be set separately or integrally formed. That is to say, each lead 51 can be divided into multiple sections. As long as it is a metal connector connected between the temperature sensing element 52 and the circuit board 21 and plays a conductive role, it is called a lead.

[0036] like Figure 2 、 Figure 6 As shown, the housing 4 also includes a second hole section 42, the base portion 311 is located in the second hole section 42, the inner hole diameter of the second hole section 42 is larger than the inner hole diameter of the first hole section 41, and a connecting surface 43 is included between the first hole section 41 and the second hole section 42, and the connecting surface 43 supports the base portion 311. The sensor of the present application also includes a first seal 32. In the longitudinal direction of the sensor, the base portion 311 is against the first seal 32, and the first seal 32 is against the connecting surface 43, which limits the medium flowing into the first hole section 41 to flow to the top of the adapter 3, so as not to affect the electrical performance of the circuit board 21, the core 22, etc.

[0037] The various technical features of the above-described embodiments can be combined. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and variations without departing from the concept of the present invention, and these modifications and variations fall within the scope of protection of the present invention.

Claims

1. A sensor, characterized in that: The invention comprises a transfer component (3), a housing (4), a temperature sensing component (5), and a protective sleeve (6); the housing (4) comprises a cavity; the transfer component (3) is at least partially located in the cavity; the protective sleeve (6) is at least partially located in the cavity; the protective sleeve (6) is fixedly connected or position-limitedly connected to the transfer component (3); the protective sleeve (6) comprises an accommodating cavity (66); the temperature sensing component (5) is partially located in the accommodating cavity (66); the temperature sensing component (5) comprises a temperature sensing element (52), a lead wire (53); and a temperature sensing element (53). 1), the temperature sensing element (52) is electrically connected to the lead (51), the temperature sensing element (52) is located in the accommodating cavity (66), the lead (51) includes a protruding portion (511), the protruding portion (511) extends downward from the adapter component (3), the protruding portion (511) is located in the accommodating cavity (66), the protective sleeve (6) includes a sleeve bottom (61), the sleeve bottom (61) includes a first filter hole (611), and the first filter hole (611) is connected to the accommodating cavity (66).

2. The sensor according to claim 1, wherein The protective sleeve (6) comprises a first conducting portion (612), the first conducting portion (612) being located at the bottom portion (61) of the sleeve, the first conducting portion (612) comprising one or more first filter holes (611), and a projected area of ​​the first conducting portion (612) covering a projected area of ​​the temperature sensing element (52) on a projection plane perpendicular to the axial direction of the protective sleeve (6).

3. The sensor according to claim 1, wherein The bottom of the sleeve (61) is located outside the cavity. The protective sleeve (6) further comprises a protective portion (62) and a connecting portion (63). The connecting portion (63) is fixedly connected or position-limitedly connected to the adapter component (3). One end of the protective portion (62) is connected to the connecting portion (63), and the other end of the protective portion (62) is connected to the bottom of the sleeve (61). The protective portion (62) comprises a second filter hole (621), and the second filter hole (621) is communicated with the accommodating cavity (66).

4. The sensor according to claim 3, wherein The protective portion (62) includes a second conductive portion (622), the second conductive portion (622) is closer to the bottom of the sleeve (61) relative to the connecting portion (63), the second conductive portion (622) includes a plurality of second filter holes (621), and on a projection plane perpendicular to the radial direction of the protective sleeve (6), the projection area of ​​the second conductive portion (622) can cover at least half the height of the projection area of ​​the sensing element (52).

5. The sensor according to claim 3 or 4, characterized in that The lead (51) includes a first lead (512) and a second lead (513), the minimum distance between the first lead (512) and the second lead (513) is defined as d, the aperture of the first filter hole (611) is defined as D1, and the aperture of the second filter hole (621) is defined as D2, then the following conditions are satisfied: D1 is less than 1 / 2d, and D2 is less than 1 / 2d.

6. The sensor according to claim 1, wherein The material of the protective sleeve (6) is an insulating material, and the material of the shell (4) is metal. In the radial direction of the sensor, the protective sleeve (6) is located between the shell (4) and the lead wire. The protective sleeve (6) includes a first protective sleeve (64) and a second protective sleeve (65). The first protective sleeve (64) and the second protective sleeve (65) are fixed by snapping.

7. The sensor according to claim 3, wherein The adapter component (3) includes an adapter seat (31), and the adapter seat (31) includes a base portion (311) and a protruding portion (312). The protruding portion (312) protrudes from the base portion (311) toward the temperature sensing element (52). The protruding portion (312) is partially located in the accommodating cavity (66). The protruding portion (312) is fixedly connected or positionally connected to the connecting portion (63). One of the outer wall of the protruding portion (312) and the inner wall of the connecting portion (63) includes a concave portion and the other includes a convex portion. The protruding portion (312) and the connecting portion (63) are engaged in a concave-convex manner.

8. The sensor according to claim 7, wherein The housing (4) comprises a first hole section (41), the protective portion (62) is at least partially located in the first hole section (41), and the outer side wall of the protective portion (62) is clearance-matched with the inner side wall of the first hole section (41).

9. The sensor according to claim 7, wherein The invention also includes a core component (2), wherein the core component (2) includes a circuit board (21) and a core (22), wherein the core (22) is electrically connected to the circuit board (21), and the base portion (311) includes a mounting groove (3111), wherein the notch of the mounting groove (3111) faces a side away from the temperature sensing element (52), and the core (22) is located in the mounting groove.

10. The sensor according to claim 8, wherein The housing further comprises a first sealing member (32), the housing comprises a second hole section (42), the base portion (311) is located in the second hole section (42), the inner hole diameter of the second hole section (42) is larger than the inner hole diameter of the first hole section (41), a connecting surface (43) is included between the first hole section (41) and the second hole section (42), the connecting surface (43) supports the base portion (311), the base portion (311) abuts against the first sealing member (32), and the first sealing member (32) abuts against the connecting surface (43).

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