Light source shell of photoelectric sensor

Abstract

The utility model belongs to the technical field of sensor manufacturing, and particularly relates to a light source shell of a photoelectric sensor, which comprises a shell body and a light source mounting seat, the shell body is provided with a light inlet and a light outlet, the shell body is provided with a mounting groove outside the light inlet, the axis of the mounting groove is collinear with the axis of the light inlet, and the light source mounting seat can be slidably arranged in the mounting groove. A first limiting part is axially arranged in the mounting groove, a second limiting part matched with the first limiting part is arranged on the light source mounting seat, and the first limiting part is matched with the second limiting part, so that the light source mounting seat does not move in the radial direction in the process of adjusting the position of the light source mounting seat in the mounting groove in the axial direction of the mounting groove; according to the invention, the problem of how to reduce the difficulty of the assembly process and ensure that the light source does not radially move relative to the axis of the light inlet is solved.

Description

Technical Field

[0001] The present application belongs to the field of sensor manufacturing technology, and specifically relates to a light source housing of a photoelectric sensor. Background Art

[0002] Inside the transmitting end of the photoelectric sensor, the light source is placed at the focal point of a convex lens, so that the light from the light source forms parallel rays after passing through the convex lens, which makes it easier to sense the object to be sensed. Therefore, during the assembly process, it is quite difficult to install the light source (light-emitting diode) at the focal point of the convex lens. When adjusting the position of the light source, it is necessary to ensure that the light source is axially positioned on the central axis of the convex lens (the focal point of the convex lens is on the central axis) and that the light source does not deviate from the central axis of the convex lens. In other words, the light source must be prevented from radial movement based on the central axis of the convex lens. Therefore, it is very difficult to control the relative position between the light source and the convex lens, which increases the difficulty of assembly. Utility Model Content

[0003] The purpose of this application is mainly to address the shortcomings of the existing technology. A light source housing of a photoelectric sensor is designed by setting a mounting groove on the housing and cooperating with a light source mounting seat. This can ensure that the light source set in the mounting groove is located on the axis of the light entrance, and at the same time prevent the light source from moving radially relative to the axis of the light entrance during the installation process. It solves the problem of how to reduce the difficulty of the assembly process and ensure that the light source will not move radially relative to the axis of the light entrance.

[0004] In order to achieve the above objectives, the technical solution adopted in this application is:

[0005] A light source shell of a photoelectric sensor includes a shell body and a light source mounting seat, wherein the shell body is provided with a light inlet and a light outlet, and the shell body is provided with a mounting groove outside the light inlet, the axis of the mounting groove is collinear with the axis of the light inlet, the light source mounting seat can be slidably arranged in the mounting groove, a first limiting portion is axially provided in the mounting groove, and a second limiting portion is provided on the light source mounting seat to cooperate with the first limiting portion, and the first limiting portion cooperates with the second limiting portion so that the light source mounting seat will not move radially during the process of adjusting the position of the light source mounting seat in the axial direction of the mounting groove.

[0006] Preferably, a limiting block is radially provided on the light source mounting seat, and a limiting groove cooperating with the limiting block is axially provided on the shell body between the two ends of the mounting groove.

[0007] Preferably, the first limiting portion includes a rib, the length of which is parallel to the length of the light source mounting seat; the second limiting portion is a slot, the length of which is parallel to the length of the mounting groove; one end of the slot is between the two ends of the mounting groove; the other end of the slot extends from an end of the mounting groove facing away from the light entrance to outside the mounting groove; when the side of the light source mounting seat facing away from the rib is in contact with the side of the mounting groove facing away from the slot, the side of the rib facing away from the light source mounting seat is flush with the outer surface of the slot.

[0008] Preferably, one end of the mounting groove facing away from the light entrance extends outside the shell body, and a projection of the light source mounting seat on a plane perpendicular to the axis of the slot is larger than a projection of the slot on a plane perpendicular to the axis of the slot.

[0009] Preferably, the shell body and the light source mounting seat are both made of plastic.

[0010] Preferably, the shape of the inner cross-section of the mounting groove is the same as the shape of the outer cross-section of the light source mounting seat, the shape and size of the outer cross-section of the light source mounting seat is smaller than the shape and size of the inner cross-section of the mounting groove, and the light source mounting seat and the mounting groove are clearance-matched.

[0011] Preferably, a plane mirror is provided on the side of the shell body facing away from the light outlet, and a convex lens is coaxially provided at the light outlet. The light emitted from the light source can be emitted from the light outlet after being reflected by the plane mirror, and the direction of the light emitted from the light source after being reflected by the plane mirror is parallel to the axis of the light outlet.

[0012] Compared with the prior art, this application has the following beneficial effects:

[0013] 1. This application adopts the method of setting a mounting groove on the shell and cooperating with the light source mounting seat to design a light source shell of a photoelectric sensor, which can ensure that the light source set in the mounting groove is located on the axis of the light entrance, and at the same time can prevent the light source from moving radially relative to the axis of the light entrance during the installation process, thereby solving the problem of how to reduce the difficulty of the assembly process and ensure that the light source will not move radially relative to the axis of the light entrance.

[0014] 2. In the present application, the light source mounting seat will not move radially in the mounting groove due to the cooperation between the ridges and the notches.

[0015] 3. The present application can reduce the volume of the shell body by setting a plane mirror, thereby saving space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the present application after the cover is removed;

[0017] Figure 2 for Figure 1 The structural diagram on the back;

[0018] Figure 3 This is an exploded view of this application.

[0019] Among them, 1. Shell body; 2. Light source mounting seat; 3. Light inlet; 4. Light outlet; 5. Mounting groove; 6. Limit block; 7. Limit groove; 8. Protrusion; 9. Notch; 12. Plane mirror; 13. Convex lens; 14. Light source; 15. Cover. DETAILED DESCRIPTION

[0020] like Figure 1-3 As shown, a light source shell of a photoelectric sensor includes a shell body 1 and a light source mounting seat 2. The shell body 1 is provided with a light inlet 3 and a light outlet 4. A mounting groove 5 is provided on the shell body 1 outside the light inlet 3. The axis of the mounting groove 5 is collinear with the axis of the light inlet 3. The light source mounting seat 2 can be slidably arranged in the mounting groove 5. A first limiting portion is axially provided in the mounting groove 5. A second limiting portion cooperating with the first limiting portion is provided on the light source mounting seat 2. The first limiting portion cooperates with the second limiting portion so that the light source mounting seat 2 will not move radially during the process of adjusting the position of the light source mounting seat 2 in the axial direction of the mounting groove 5 in the mounting groove 5.

[0021] In the present application, when assembling the shell body 1 into a light source housing, the light source 14 is first coaxially mounted on the light source mounting base 2. Then, the light source mounting base 2 is coaxially placed in the mounting groove 5. The first limiting portion cooperates with the second limiting portion to prevent the light source 14 from moving radially relative to the light inlet 3. After that, the worker only needs to adjust the axial position of the light source mounting base 2 in the mounting groove 5, and then drip glue into the mounting groove 5 to fix the light source mounting base 2 in the mounting groove 5. In this way, there is no need to consider the radial distance of the light source 14 relative to the mounting groove 5. This reduces the difficulty of assembly.

[0022] As a preferred embodiment, a limiting block 6 is radially provided on the light source mounting seat 2 , and a limiting groove 7 cooperating with the limiting block 6 is axially provided on the shell body 1 between the two ends of the mounting groove 5 .

[0023] During assembly, the worker installs the light source mounting seat 2 in the mounting groove 5, and at the same time inserts the limit block 6 into the limit groove 7, so that the worker can adjust the position of the light source mounting seat 2 in the mounting groove 5 by moving the limit block 6 in the limit groove 7. After moving into place, the worker can drip glue into the gap between the limit block 6 and the limit groove 7, thereby sticking the light source mounting seat 5 and the mounting groove 5 together and fixing them.

[0024] As a preferred embodiment, the first limiting portion includes a rib 8, the length line of the rib 8 is parallel to the length line of the light source mounting seat 2, the second limiting portion is a slot 9, the length line of the slot 9 is parallel to the length line of the mounting groove 5, one end of the slot 9 is between the two ends of the mounting groove 5, and the other end of the slot 9 extends from the end of the mounting groove 5 facing away from the light entrance 3 to outside the mounting groove 5. When the side of the light source mounting seat 2 facing away from the rib 8 is in contact with the side of the mounting groove 5 facing away from the slot 9, the side of the rib 8 facing away from the light source mounting seat 2 is flush with the outer surface of the slot 9.

[0025] In this embodiment, the length of the ribs 8 is shorter than the length of the notches 9, and the width of the ribs 8 is equal to the width of the notches 9. During assembly, after the light source mounting base 2 is placed in the mounting groove 5, the side of the ribs 8 facing away from the light source mounting base 2 is aligned with the outer surface of the notches 9. The housing 1 is then covered with a cover 15, which blocks the side of the ribs 8 facing away from the light source mounting base 2. The fit between the ribs 8 and the notches 9 prevents the light source mounting base 2 from moving radially within the mounting groove 5.

[0026] As a preferred embodiment, the end of the mounting groove 5 facing away from the light inlet 3 extends outside the shell body 1, and the projection of the light source mounting base 2 on a plane perpendicular to the axis of the slot 9 is larger than the projection of the slot 9 on a plane perpendicular to the axis of the slot 9. With this arrangement, the wires connected to the light source on the light source mounting base 2 can extend from the end of the mounting groove 5 facing away from the light inlet 3 to the outside of the shell body 1.

[0027] As a preferred embodiment, the housing body 1 and the light source mounting base 2 are both made of plastic.

[0028] As a preferred embodiment, the inner cross-section of the mounting groove 5 is the same as the outer cross-section of the light source mounting base 2, the outer cross-section of the light source mounting base 2 is smaller than the inner cross-section of the mounting groove 5, and there is a clearance fit between the light source mounting base 2 and the mounting groove 5. This arrangement prevents radial movement exceeding the error value due to an excessive clearance between the mounting groove 5 and the light source mounting base 2.

[0029] As a preferred embodiment, a plane mirror 12 is provided on the side of the shell body 1 facing away from the light outlet 4, and a convex lens 13 is coaxially provided at the light outlet 4. The light emitted from the light source 14 can be emitted from the light outlet 4 after being reflected by the plane mirror 12, and the direction of the light emitted from the light source 14 after being reflected by the plane mirror 12 is parallel to the axis of the light outlet 4.

[0030] With this arrangement, light emitted by the light source 14 is reflected by the plane mirror 12 and then enters the convex lens 13. The image of the light source 14 in the plane mirror 12 is located at the focal point of the convex lens 13. The convex lens 13 then disperses the light emitted by the plane mirror 13, making the cross-section of the light emitted from the shell body 1 larger, which facilitates sensing objects outside the shell body 1. The arrangement of the plane mirror 12 can thus reduce the volume of the shell body 1, thereby saving space.

Claims

1. A light source housing of a photoelectric sensor, characterized in that: The light source mounting seat (2) comprises a shell body (1) and a light source mounting seat (2), wherein the shell body (1) is provided with a light inlet (3) and a light outlet (4), and a mounting groove (5) is provided on the shell body (1) outside the light inlet (3), wherein the axis of the mounting groove (5) is colinear with the axis of the light inlet (3), and the light source mounting seat (2) can be slidably arranged in the mounting groove (5), wherein a first limiting portion is axially provided in the mounting groove (5), and a second limiting portion cooperating with the first limiting portion is provided on the light source mounting seat (2), wherein the first limiting portion cooperates with the second limiting portion so that the light source mounting seat (2) does not move radially when the light source mounting seat (2) adjusts its position in the axial direction of the mounting groove (5) in the mounting groove (5).

2. The light source housing of a photoelectric sensor according to claim 1, characterized in that: A limiting block (6) is radially provided on the light source mounting seat (2), and a limiting groove (7) cooperating with the limiting block (6) is axially provided on the shell body (1) between the two ends of the mounting groove (5).

3. The light source housing of a photoelectric sensor according to claim 1, characterized in that: The first limiting portion includes a rib (8), the length of which is parallel to the length of the light source mounting seat (2); the second limiting portion is a slot (9), the length of which is parallel to the length of the mounting groove (5); one end of the slot (9) is between the two ends of the mounting groove (5); the other end of the slot (9) extends from the end of the mounting groove (5) facing away from the light inlet (3) to the outside of the mounting groove (5); when the side of the light source mounting seat (2) facing away from the rib (8) is in contact with the side of the mounting groove (5) facing away from the slot (9), the side of the rib (8) facing away from the light source mounting seat (2) is flush with the outer surface of the slot (9).

4. The light source housing of a photoelectric sensor according to claim 3, characterized in that: One end of the mounting groove (5) facing away from the light inlet (3) extends outside the shell body (1), and a projection of the light source mounting seat (2) on a plane perpendicular to the axis of the slot (9) is larger than a projection of the slot (9) on a plane perpendicular to the axis of the slot (9).

5. The light source housing of a photoelectric sensor according to claim 4, characterized in that: The shell body (1) and the light source mounting seat (2) are both made of plastic.

6. The light source housing of a photoelectric sensor according to claim 1, characterized in that: The shape of the inner cross section of the mounting groove (5) is the same as the shape of the outer cross section of the light source mounting seat (2), the shape and size of the outer cross section of the light source mounting seat (2) is smaller than the shape and size of the inner cross section of the mounting groove (5), and there is a clearance fit between the light source mounting seat (2) and the mounting groove (5).

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