Lens mechanism and sensor

Abstract

The utility model discloses a lens mechanism and sensor belongs to sensor technical field, including lens and casing, the casing at least includes the casing and is provided with the accommodation groove and the glue storage groove of casing, the accommodation groove is used for installing the lens, the lens with the casing interference fit connection, the glue storage groove is used for the glue storage groove, and the accommodation groove is used for the glue storage groove. The containing groove is communicated with the glue storage groove, the projection of the glue storage groove in the installation direction of the lens is located on the lens, and the glue storage groove is annular when observed in the installation direction. According to the utility model, the technical effects of improving the assembly precision and qualified rate of the lens are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and particularly relates to a lens mechanism and a sensor. Background Art

[0002] With the rapid development of electronic technology, more and more products will use photoelectric sensors. Photoelectric sensors transmit "light" such as visible light and infrared rays through a transmitter, and detect the change in the amount of light reflected by an object or blocked by a receiver to obtain an output signal. A photoelectric sensor is a sensor that uses light as a detection method to detect an object. At present, in sensor technology, it is usually necessary to install a lens inside a housing. Since the size of the lens is larger than the size of the lens groove inside the housing for installing the lens, in the process of pressing the lens into the lens groove, the lens will scrape off the plastic material on the inner wall of the housing. After the scraped plastic material is squeezed into the lens groove, it is easy to cause uneven assembly of the lens, and it is difficult to ensure that the center of the lens overlaps with the center of the glue storage groove, resulting in reduced assembly accuracy of the lens, which is not conducive to improving the qualified rate of photoelectric sensors.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the assembly accuracy of the lens is poor and the qualified rate of the photoelectric sensor is low.

[0005] In order to solve the above technical problems, the utility model provides a lens mechanism, which includes: a lens and a shell, wherein the shell at least includes a shell and a receiving groove and a glue storage groove arranged on the shell, the receiving groove is used to install the lens, the lens is connected to the shell by interference fit, the receiving groove and the glue storage groove are communicated, the projection of the glue storage groove along the installation direction of the lens is located on the lens, and when observed from the installation direction, the glue storage groove is annular.

[0006] Optionally, the shell includes a first side surface and a second side surface that are oppositely arranged, the receiving groove is recessed along the first side surface toward the second side surface, and the glue storage groove is recessed along the receiving groove toward the second side surface.

[0007] Optionally, a center line of the lens is parallel to a center line of the accommodating groove.

[0008] Optionally, the outer diameter of the lens is not less than the inner diameter of the accommodating groove.

[0009] Optionally, the shell is made of plastic material.

[0010] Optionally, the glue storage groove includes a connecting surface and a glue storage surface connected to the connecting surface, the connecting surface is connected to the inner wall of the receiving groove, the glue storage surface is an arc-shaped surface, and the glue storage surface is recessed in a direction away from the receiving groove.

[0011] Optionally, the lens includes a first surface and a second surface connected to the first surface, the second surface is in contact with the connecting surface, and the second surface and the connecting surface are parallel.

[0012] Optionally, the shell further comprises a through slot arranged on the shell, the through slot is communicated with the receiving slot, and the glue storage slot is located between the through slot and the receiving slot.

[0013] Optionally, a projection of the through groove along the installation direction of the lens is located within the accommodating groove, and the through groove is tapered.

[0014] According to another aspect of the utility model, the utility model also provides a sensor, and the sensor includes the lens mechanism.

[0015] Beneficial effects:

[0016] The utility model provides a lens mechanism, in which a housing shell is provided with a receiving groove and a glue storage groove, the glue storage groove and the receiving groove are connected to each other, the receiving groove is used to install the lens, the lens and the housing are connected by interference fit, the projection of the glue storage groove along the installation direction of the lens is located on the lens, and when viewed from the installation direction, the glue storage groove is annular. In this way, in the process of pressing the lens into the receiving groove, the lens will shovel the plastic material on the inner wall of the housing close to the receiving groove into the glue storage groove, and after the plastic material shoveled by the lens is stored in the glue storage groove, the lens is kept flat, and then the flatness of the lens assembly is improved, and it can be ensured that the center of the lens overlaps with the center of the glue storage groove, so as to improve the assembly accuracy of the lens, which is beneficial to improve the qualified rate of the photoelectric sensor. Thereby, the technical effect of improving the assembly accuracy and qualified rate of the lens is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic structural diagram of a lens mechanism provided in an embodiment of the utility model.

[0019] Figure 2The present invention is a schematic structural diagram of a glue storage slot in a lens mechanism provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0021] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0022] In the embodiments of the present application, at least one refers to one or more; multiple refers to two or more. In the description of the present application, the words "first", "second", "third", etc. are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0023] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. It should be noted that in the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0024] It should be pointed out that in the embodiments of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. At the same time, "connection" in the embodiments of the present application can also be understood as electrical connection, and the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, A is connected to B, which can be either a direct connection between A and B or an indirect connection between A and B through one or more other electrical components. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0025] The utility model provides a lens 1 mechanism according to the first embodiment. Figure 1 to Figure 2 As shown, Figure 1 It is a structural schematic diagram of a lens 1 mechanism provided by an embodiment of the utility model. Figure 2 1 is a schematic diagram of the structure of a glue storage groove 23 in a lens 1 mechanism provided by an embodiment of the utility model. A lens 1 mechanism provided by an embodiment of the utility model includes a lens 1 and a housing 2, the housing 2 at least includes a shell 21, a receiving groove 22 and a glue storage groove 23, the receiving groove 22 and the glue storage groove 23 are respectively arranged on the shell 21, the receiving groove 22 is used to install the lens 1, the lens 1 is connected to the shell 21 by interference fit, the receiving groove 22 and the glue storage groove 23 are connected to each other, the projection of the glue storage groove 23 along the installation direction of the lens 1 is located on the lens 1, and when viewed from the installation direction, the glue storage groove 23 is annular, and the installation direction can refer to Figure 1 In the direction from top to bottom.

[0026] The lens 1 and the housing 21 are connected by interference fit to ensure that the lens 1 is firmly installed inside the receiving groove 22 of the housing 2. The glue storage groove 23 presents an annular structure, and the glue storage groove 23 is arranged around the edge of the lens 1. In the actual assembly process, the lens 1 is pressed into the interior of the receiving groove 22 along the installation direction. Due to the effect of interference fit, the lens 1 will slightly squeeze the inner wall 221 of the housing 21 close to the receiving groove 22, so that the plastic material in this area is shoveled into the inside of the glue storage groove 23 in the direction close to the glue storage groove 23. The plastic material shoveled off is collected by the glue storage groove 23, which effectively avoids the uneven bottom of the lens 1 due to uneven extrusion of the plastic material after the lens 1 is installed, which is conducive to improving the flatness of the lens 1 assembly.

[0027] In this embodiment, the housing 21 of the outer shell 2 is provided with a receiving groove 22 and a glue storage groove 23, the glue storage groove 23 is connected with the receiving groove 22, the receiving groove 22 is used to install the lens 1, the lens 1 is connected with the housing 21 by interference fit, the projection of the glue storage groove 23 along the installation direction of the lens 1 is located on the lens 1, and when viewed from the installation direction, the glue storage groove 23 is annular. In this way, when the lens 1 is pressed into the receiving groove 22, the lens 1 will shovel the plastic material on the inner wall 221 of the housing 21 close to the receiving groove 22 into the glue storage groove 23, and the plastic material shoveled by the lens 1 is stored in the glue storage groove 23, so that the lens 1 remains flat, and then the flatness of the assembly of the lens 1 is improved, and it can ensure that the center of the lens 1 overlaps with the center of the glue storage groove 23, so as to improve the assembly accuracy of the lens 1, which is conducive to improving the qualified rate of the photoelectric sensor. Thereby, the technical effect of improving the assembly accuracy and qualified rate of the lens 1 is achieved.

[0028] As an embodiment, the housing 21 includes a first side surface 211 and a second side surface 212, the first side surface 211 and the second side surface 212 are arranged opposite to each other, the first side surface 211 may refer to the top side surface of the housing 21, and the second side surface 212 may refer to the bottom side surface of the housing 21. The receiving groove 22 is formed by being concave along the first side surface 211 toward the direction close to the second side surface 212, and the glue storage groove 23 is formed by being concave along the receiving groove 22 toward the direction close to the second side surface 212. As the lens 1 is pressed in, the edge of the lens 1 will contact the inner wall 221 of the housing 21 more deeply, and the plastic material shoveled off can smoothly enter the deeper glue storage groove 23, which is conducive to reducing the unevenness of the surface of the lens 1.

[0029] In some embodiments, the center line of the lens 1 is parallel to the center line of the receiving groove 22. By keeping the center line of the lens 1 parallel to the center line of the receiving groove 22, such as overlapping the center line of the lens 1 and the center line of the receiving groove 22, the lens 1 can move smoothly along a predetermined trajectory during installation, avoiding assembly errors caused by tilting.

[0030] In some embodiments, the outer diameter of the lens 1 is not less than the inner diameter of the receiving groove 22. When the outer diameter of the lens 1 is slightly larger than the inner diameter of the receiving groove 22, the lens 1 can generate sufficient extrusion force during the process of being pressed into the receiving groove 22, so as to shovel the plastic material on the inner wall 221 of the housing 21 into the inside of the glue storage groove 23, and at the same time ensure the stable installation of the lens 1. The sufficient interference makes the connection between the lens 1 and the housing 21 tighter, reduces the assembly problems caused by looseness, and improves the flatness and assembly accuracy of the surface of the lens 1, which is conducive to improving the overall performance of the photoelectric sensor.

[0031] In some embodiments, the housing 21 is made of plastic material. Using plastic material to make the housing 21 is not only conducive to reducing production costs, but also improves the processability and molding accuracy of the housing 21. The flexibility of the plastic material allows the housing 21 to undergo a certain degree of elastic deformation during the pressing process of the lens 1, so as to better adapt to the shape of the lens 1 and ensure a close fit between the lens 1 and the housing 21.

[0032] In some embodiments, the glue storage groove 23 includes a connecting surface 231 and a glue storage surface 232, the glue storage surface 232 and the connecting surface 231 are connected to each other, the connecting surface 231 and the glue storage surface 232 can enclose the glue storage groove 23, the connecting surface 231 is connected to the inner wall 221 of the receiving groove 22, the glue storage surface 232 is an arc-shaped surface, and the glue storage surface 232 is concave in a direction away from the receiving groove 22. The connecting surface 231 may refer to the connecting surface 231 located between the glue storage surface 232 and the inner wall 221 of the receiving groove 22, the connecting surface 231 may be a horizontal surface, and the lens 1 is in contact with the connecting surface 231. When the glue storage surface 232 of the glue storage groove 23 is in an arc shape, it will not only increase the storage space, but also optimize the flow path of the plastic material, reduce the direct impact of the plastic material on the surface of the lens 1, and facilitate the lens 1 to be pressed into the predetermined position more smoothly during the installation process to achieve the best assembly state.

[0033] In some embodiments, the lens 1 includes a first surface 11 and a second surface 12, the second surface 12 is connected to the first surface 11, the second surface 12 and the connecting surface 231 are in contact with each other, and the second surface 12 and the connecting surface 231 are parallel to each other. The first surface 11 may refer to a convex curved surface in the lens 1, and the second surface 12 may refer to the bottom side of the lens 1. The parallel contact surface of the second surface 12 in the lens 1 enables the lens 1 to be uniformly stressed during the assembly process, avoiding assembly problems caused by stress concentration, and the uniform contact area also enhances the connection strength between the lens 1 and the housing 21.

[0034] In some embodiments, the housing 2 further includes a through slot 24, which is disposed inside the housing 21, the through slot 24 is communicated with the receiving slot 22, and the glue storage slot 23 is located between the through slot 24 and the receiving slot 22. The through slot 24 may refer to a light-emitting hole, and after the lens 1 is installed inside the receiving slot 22, the path of light passing through the lens 1 may pass through the through slot 24.

[0035] In some embodiments, the projection of the through groove 24 along the installation direction of the lens 1 is located inside the accommodating groove 22, and the through groove 24 is tapered, so that the through groove 24 is wider at the entrance close to the glue storage groove 23, and gradually narrows at the exit away from the glue storage groove 23. At the same time, the inner diameter of the entrance of the through groove 24 is smaller than the inner diameter of the lens 1, and a step is formed between the entrance of the through groove 24 and the accommodating groove 22. The glue storage groove 23 is located at the step, and the lens 1 can be prevented from entering the interior of the through groove 24.

[0036] In order to explain a sensor provided by the utility model in detail, the above-mentioned embodiment 1 explains a lens 1 mechanism in detail. Based on the same utility model concept, the present application also provides a sensor, see embodiment 2 for details.

[0037] The second embodiment of the present invention provides a sensor, and the sensor includes the lens 1 mechanism.

[0038] The utility model provides a sensor, wherein a housing 21 of a shell 2 is provided with a receiving groove 22 and a glue storage groove 23, the glue storage groove 23 is connected with the receiving groove 22, the receiving groove 22 is used to install a lens 1, the lens 1 is connected with the housing 21 by interference fit, the projection of the glue storage groove 23 along the installation direction of the lens 1 is located on the lens 1, and when viewed from the installation direction, the glue storage groove 23 is annular. In this way, when the lens 1 is pressed into the receiving groove 22, the lens 1 will shovel the plastic material of the inner wall 221 of the housing 21 close to the receiving groove 22 into the glue storage groove 23, and after the plastic material shoveled off by the lens 1 is stored in the glue storage groove 23, the lens 1 is kept in a flat state, and then the flatness of the assembly of the lens 1 is improved, and it can be ensured that the center of the lens 1 overlaps with the center of the glue storage groove 23, so as to improve the assembly accuracy of the lens 1, which is conducive to improving the qualified rate of the photoelectric sensor. Thus, the technical effect of improving the assembly accuracy and qualified rate of the lens 1 is achieved.

[0039] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A lens mechanism, characterized in that: The lens mechanism includes: a lens and a shell, the shell at least includes a shell and a receiving groove and a glue storage groove arranged on the shell, the receiving groove is used to install the lens, the lens is connected to the shell by interference fit, the receiving groove and the glue storage groove are communicated, the projection of the glue storage groove along the installation direction of the lens is located on the lens, and when observed from the installation direction, the glue storage groove is annular.

2. The lens mechanism according to claim 1, characterized in that: The shell includes a first side surface and a second side surface that are opposite to each other. The receiving groove is recessed along the first side surface toward the second side surface, and the glue storage groove is recessed along the receiving groove toward the second side surface.

3. The lens mechanism according to claim 1, characterized in that: The center line of the lens is parallel to the center line of the receiving groove.

4. The lens mechanism according to claim 1, characterized in that: The outer diameter of the lens is not less than the inner diameter of the accommodating groove.

5. The lens mechanism according to claim 1, characterized in that: The shell is made of plastic material.

6. The lens mechanism according to claim 1, characterized in that: The glue storage groove includes a connecting surface and a glue storage surface connected to the connecting surface, the connecting surface is connected to the inner wall of the receiving groove, the glue storage surface is an arc-shaped surface, and the glue storage surface is concave in a direction away from the receiving groove.

7. The lens mechanism according to claim 6, characterized in that: The lens includes a first surface and a second surface connected to the first surface, the second surface is in contact with the connecting surface, and the second surface and the connecting surface are parallel.

8. The lens mechanism according to claim 1, characterized in that: The shell further comprises a through slot arranged on the shell body, the through slot is communicated with the receiving slot, and the glue storage slot is located between the through slot and the receiving slot.

9. The lens mechanism according to claim 8, characterized in that: The projection of the through groove along the installation direction of the lens is located in the accommodating groove, and the through groove is tapered.

10. A sensor, characterized in that: The sensor comprises a lens mechanism as claimed in any one of claims 1 to 9.

Images