Limiting type sensor protection device

Abstract

The utility model discloses a limiting type sensor protection device, which comprises a substrate, and a contact shaft, a first spring, a second spring, a limiting induction block and a sensor which are arranged on the substrate, the contact shaft comprises a first section, a second section and a third section; the second section and the third section are sleeved with a first spring and a second spring respectively. One end of the first section extends out relative to the edge of one end of the substrate on the normal projection, and the other end of the first section is in contact with the first spring; a shaft sleeve is arranged at one end of the second spring; the limiting induction block comprises a first movable end and a second movable end which are perpendicular to each other, the second movable end penetrates through the base plate to protrude, and a fastener is arranged at one end of the second movable end. The first movable end is arranged between the first spring and the second spring; a sliding groove matched with the second movable end is formed in the base plate and used for limiting the second movable end. When the device is used, a detected object does not crack up the sensor when exceeding a detection range, so that the sensor is effectively protected, and the service life of the sensor is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of sensor protection shells, in particular to a position-limiting sensor protection device. Background Art

[0002] Sensors are important components of automation equipment, but in some application scenarios, the protection effect of common sensor protection structures is not ideal. When encountering external forces, the sensor shell is easily squeezed and damaged, which in turn affects the service life of the sensor, causing considerable economic losses to users, bringing great inconvenience to users, and reducing the practicality of the sensor protection structure. In addition, environmental factors will interfere with or damage the sensor, greatly affecting the stability of the equipment. Utility Model Content

[0003] In view of this, the utility model provides a limit sensor protection device to solve the above problems.

[0004] In order to solve the above technical problems, the utility model provides a limit sensor protection device, comprising:

[0005] A substrate, and a contact shaft, a first spring, a second spring, a limit sensing block and a sensor arranged on the substrate; wherein the elastic coefficient of the first spring is greater than the elastic coefficient of the second spring.

[0006] The contact shaft comprises a first section, a second section and a third section, wherein the first section can slide relative to the second section; the second section and the third section are respectively sleeved with a first spring and a second spring; one end of the first section extends relative to an edge of one end of the substrate on its normal projection, and the other end thereof contacts the first spring; one end of the third section is provided with a shaft sleeve for limiting the position thereof;

[0007] The limit sensing block includes a first movable end and a second movable end which are arranged perpendicularly to each other, the second movable end protrudes through the substrate, and a fastener is arranged at one end thereof; the first movable end is arranged between the first spring and the second spring, and can move with the second movable end along the extension direction of the contact axis;

[0008] A slide groove matching the second movable end is arranged on the base plate and is used for limiting the second movable end.

[0009] As an optional method, the sensor is fixed on the substrate via a sensor holder.

[0010] As an optional manner, the first section and the second section of the contact shaft are slidably connected and / or sleevedly connected.

[0011] As an optional manner, a contact and a fixing point for positioning the contact are provided at one end of the first section of the contact shaft away from the second section, and the contact extends relative to the fixing point.

[0012] As an optional manner, a first washer is arranged along the edge of the slide groove, and the second movable end is sleeved with a second washer; the outer diameter and the inner diameter of the first washer are equal to those of the second washer.

[0013] As an optional manner, the fastener is a retaining spring, which is arranged on the second washer and is used to limit the second washer.

[0014] As an option, the contact is a flexible member.

[0015] As an optional manner, it further comprises a shell having a housing cavity for accommodating the substrate; and slots for allowing the contact shaft and the sensor to extend are formed at both ends of the shell.

[0016] The beneficial effects of the utility model are:

[0017] The cooperation between the first spring and the second spring of the utility model ensures that the sensor will not be damaged even if the detected object exceeds the detection range, thereby effectively protecting the sensor and extending the service life of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the assembly of a substrate of a limit sensor protection device provided by an embodiment of the utility model;

[0019] Figure 2 A top view of the upper shell of the limit sensor protection device provided by the embodiment of the utility model;

[0020] Figure 3 A schematic diagram of one side of the limit sensor protection device with an upper shell provided in an embodiment of the utility model.

[0021] Reference numerals and their corresponding relationships:

[0022] 1-sensor, 2-substrate, 3-first spring, 4-contact shaft, 5-second spring, 6-sleeve, 7-limit sensing block, 8-sensor seat, 9-fastener, 10-second gasket, 12-housing, 15-contact, 16-fixing point. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0024] Example

[0025] See also Figure 1-Figure 3, this embodiment provides a limit sensor 1 protection device, including:

[0026] A substrate 2, and a contact shaft 4, a first spring 3, a second spring 5, a limit sensing block 7 and a sensor 1 arranged on the substrate 2; wherein the elastic coefficient of the first spring 3 is greater than the elastic coefficient of the second spring 5, that is, the first spring 3 is a strong spring and the second spring 5 is a weak spring.

[0027] The contact shaft 4 includes a first section, a second section and a third section, the first section can slide relative to the second section; the second section and the third section are respectively sleeved with a first spring 3 and a second spring 5; one end of the first section extends out from an edge of one end of the substrate 2 on its normal projection, and the other end is in contact with the first spring 3; one end of the third section is provided with a shaft sleeve 6 for limiting the contact shaft 4.

[0028] Please refer again Figure 1 The first section described in this embodiment is the part of the contact shaft 4 without a spring; the second section is the part of the contact shaft 4 with a spring arranged on the left side of the limit sensing block 7; and the third section is the part of the contact shaft 4 with a spring arranged on the right side of the limit sensor.

[0029] The limit sensing block 7 includes a first movable end and a second movable end which are arranged perpendicularly to each other. The second movable end protrudes through the substrate 2, and a fastener 9 is arranged at one end thereof. The first movable end is arranged between the first spring 3 and the second spring 5, and can move with the second movable end along the extension direction of the contact shaft 4.

[0030] The base plate 2 is provided with a slide groove matching the second movable end, which is used to limit the second movable end;

[0031] As an optional method, the sensor 1 is fixed on the substrate 2 through the sensor seat 8. The sensor 1 is wirelessly connected to the limit sensing block 7. When the limit sensing block 7 is displaced, the sensor 1 can detect the motion trajectory and / or pressure. The specific model and type of the sensor 1 are not limited in this embodiment, and it can be a pressure sensor 1, or a photoelectric sensor 1, etc.

[0032] As an optional method, a contact 15 and a fixing point 16 for positioning the contact 15 are provided at one end of the first section of the contact shaft 4 away from the second section, and the contact 15 extends relative to the fixing point 16. The contact 15 can be fixedly arranged or rotatably arranged to increase the external buffering of the contact 15 sleeve. It can be a flexible member such as rubber, and the specific arrangement method and material are not limited in this embodiment.

[0033] As an optional manner, a first washer is arranged along the edge of the slide groove, and the second movable end is sleeved with a second washer 10 ; the outer diameter and the inner diameter of the first washer are equal to those of the second washer 10 .

[0034] As an optional manner, the fastener 9 is a retaining spring, which is arranged on the second washer 10 and is used to limit the second washer 10 .

[0035] As an optional method, the housing 12 is further included, and the housing 12 has a cavity for accommodating the substrate 2, and both ends of the housing 1 are provided with slots for allowing the contact shaft 4 and the sensor 1 to extend out, so as to protect the sensor 1 from dust, oil, and other foreign matter that may contaminate the sensor 1.

[0036] Through the above scheme, when the contact 15 contacts an external object, since the rigidity of the first spring 3 is greater than that of the second spring 5, the second spring 5 will be compressed first, and then the limit sensing block 7 will move along the edge of the slide groove of the substrate 2. At this time, the sensor 1 starts to trigger detection until the limit sensor 1 slides to the limit position (that is, the slide groove is close to the vertex of one end of the sensor 1, and the stroke length of the slide groove must be less than the relative distance between the limit sensor 1 and the sensor 1). In this way, when the detected object exceeds the detection range, only the first spring 3 will be compressed, and the compression limit of the first spring 3 will not be reached to drive the limit sensor to move, thereby protecting the sensor 1 from impact.

[0037] In this way, this embodiment not only reduces the impact of high-pollution environmental factors on the sensor, but also ensures that the sensor will not be damaged even if the object being tested exceeds the detection range, thereby effectively protecting the sensor and extending the service life of the sensor.

[0038] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A limit sensor protection device, characterized in that: include: A substrate (2), and a contact shaft (4), a first spring (3), a second spring (5), a limit sensing block (7) and a sensor (1) arranged on the substrate (2); wherein the elastic coefficient of the first spring (3) is greater than the elastic coefficient of the second spring (5); The contact shaft (4) comprises a first section, a second section and a third section, the first section being able to slide relative to the second section; the second section and the third section are respectively sleeved with a first spring (3) and a second spring (5); one end of the first section extends out relative to an edge of one end of the substrate (2) on its normal projection, and the other end is in contact with the first spring (3); one end of the third section is provided with a shaft sleeve (6) for limiting the position thereof; The limit sensing block (7) comprises a first movable end and a second movable end which are arranged perpendicular to each other, the second movable end protruding through the substrate (2), and a fastener (9) is arranged at one end thereof; the first movable end is arranged between the first spring (3) and the second spring (5), and can move along the extension direction of the contact axis (4) with the second movable end; The base plate (2) is provided with a sliding groove matching the second movable end and used for limiting the position of the second movable end.

2. A limit sensor protection device according to claim 1, characterized in that: The sensor (1) is fixed on the substrate (2) via a sensor seat (8).

3. A limit sensor protection device according to claim 1, characterized in that: The first section and the second section of the contact shaft (4) are slidably connected and / or sleevedly connected.

4. A limit sensor protection device according to claim 1, characterized in that: A contact (15) and a fixing point (16) for positioning the contact (15) are provided at one end of the first section of the contact shaft (4) away from the second section, and the contact (15) protrudes relative to the fixing point (16).

5. A limit sensor protection device according to claim 1, characterized in that: A first washer is arranged along the edge of the slide groove, and the second movable end is sleeved with a second washer (10); the outer diameter and the inner diameter of the first washer are equal to those of the second washer (10).

6. A limit sensor protection device according to claim 5, characterized in that: The fastener (9) is a retaining spring, which is arranged on the second washer (10) and is used to limit the position of the second washer (10).

7. A limit sensor protection device according to claim 4, characterized in that: The contact (15) is a flexible member.

8. A limit sensor protection device according to claim 1, characterized in that: It also comprises a shell (12), the shell (12) having a receiving cavity for receiving the substrate (2), and having slots at both ends thereof for allowing the contact shaft (4) and the sensor (1) to extend out.

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