Light source device, distance measuring device and installation method

Abstract

The purpose of the present application is to provide a light source device, a distance measuring device and an installation method, wherein the light source device is mainly composed of a light-emitting device, a transmitting lens, a receiving lens, a transmitting sleeve, a shading component and a supporting and adjusting component. Among them, the transmitting sleeve is used to set the light-emitting device and to make the transmitting lens and the receiving lens coaxially arranged. The shading component is used to cover the bottom of the transmitting sleeve so that the side wall of the transmitting sleeve forms an opening area. The supporting and adjusting component is at least partially embedded in the transmitting sleeve through the opening area, and is used to support the light-emitting device and adjust the position of the light-emitting device. Compared with the prior art, the present application can facilitate coaxial arrangement while avoiding light leakage in the back gap of the light-emitting device.

Description

Technical Field

[0001] The present invention relates to the field of machinery, and in particular to a light source device, a distance measuring device and an installation method. Background Art

[0002] Distance measuring equipment such as photoelectric rangefinders are gaining more and more attention from engineers due to their long distance measurement limit, high beam directivity and fast response speed.

[0003] Normally, the scheme of aligning the axis of the emitted light with the axis of the received light, i.e. the coaxial scheme of the transmission and reception, is adopted by most photoelectric rangefinders. However, in actual use, since the light source in the light source device of the laser rangefinder must be on the same axis as the photosensitive device, and the two are very close to each other, basically within the centimeter level. But in this case, if part or even a weak component of the light emitted by the light source device of the photoelectric rangefinder does not pass through the emitting lens, but is directly projected from the gap at the back of the light emitter, it will inevitably lead to light leakage, so that the light signal received by the photosensitive part of the photoelectric rangefinder directly comes from the light leakage from the back of the light-emitting device, rather than the expected reflected light from the surface of the measured object, which will inevitably lead to malfunction of the photoelectric rangefinder.

[0004] There are currently two commonly used solutions. One is to weld the emitting sleeve in the light source device to the circuit board of the light-emitting device to eliminate the gap on the back of the light-emitting device. The other is to apply black glue on the back of the light-emitting device to fill the gap. However, there are the following defects in actual production: For the first method, the emitting sleeve needs to be welded to the circuit board of the light-emitting device, which is not only inconvenient to operate, but also easy to burn the lens. For the second method, it is very easy to cause the black glue to contaminate the lens. In addition, the solidification of the black glue also takes time, which greatly reduces the production efficiency. Therefore, these two methods are not conducive to the debugging of the collimation effect of the coaxial transceiver solution, resulting in low consistency in the optical characteristics of the product.

[0005] Therefore, how to avoid light leakage from the back gap of the light-emitting device while facilitating coaxial arrangement is a technical problem that the present invention urgently needs to solve. Summary of the invention

[0006] In view of the above-mentioned shortcomings or deficiencies of the prior art, the technical problem to be solved by the present invention is how to facilitate coaxial arrangement while avoiding light leakage from the back gap of the light-emitting device.

[0007] In order to solve the above technical problems, the present invention provides a light source device, comprising: a light emitting device, a transmitting lens, and a receiving lens;

[0008] An emitting sleeve, used for arranging the light emitting device and making the emitting lens and the receiving lens coaxially arranged;

[0009] A light shielding component, used to cover the bottom of the launch sleeve so that the side wall of the launch sleeve forms an opening area;

[0010] The supporting and adjusting component is at least partially embedded in the emitting sleeve through the opening area, and is used to support the light-emitting device and adjust the position of the light-emitting device.

[0011] Further preferably, the side wall of the launching sleeve is provided with a through opening for inserting the supporting and adjusting component; when the shading component abuts against the supporting and adjusting component and covers the bottom of the launching sleeve with an interference fit, the through opening is at least partially covered by the shading component and forms the opening area.

[0012] Further preferably, the through opening is an opening extending upward from the bottom of the launching sleeve.

[0013] Further preferably, the shading component comprises: a cover body portion provided with a groove body for covering the bottom, and a connecting portion connected to the cover body portion; wherein the connecting portion is provided with an embedding groove for inserting the supporting adjustment component.

[0014] Further preferably, the embedding groove is provided with inwardly expanding protrusions on opposite sides for slidably connecting the support adjustment component, so that a preset gap is formed between the support adjustment component and the opposite sides and bottom of the embedding groove to avoid light leakage.

[0015] Further preferably, the width of the preset gap is less than or equal to 0.5 mm.

[0016] Further preferably, a chamfered groove is provided at the top of the side wall of the shading component along the axial direction for forming the interference fit after the support adjustment component is inserted; or, a convex ring is provided on the side wall of the shading component for forming the interference fit after the support adjustment component is inserted.

[0017] Further preferably, the cover body portion is rotatably connected to the launching sleeve; the cross-sectional shape of the embedding groove is U-shaped; the shading component further comprises: a sheet-like protrusion portion arranged at the bottom of the cover body portion and connected to the cover body portion.

[0018] Further preferably, the inner surface of the cover body is coated with a light absorbing coating or a light absorbing layer is formed by sandblasting and polishing.

[0019] Further preferably, the light emitting device is a laser light source.

[0020] Further preferably, a mounting groove is provided in the transmitting sleeve; the light source device also includes: a transmitting lens arranged in the mounting groove; a receiving lens coaxially sleeved on the outside of the transmitting sleeve; and a photosensitive element arranged under the light shielding cover and used for receiving the receiving light refracted by the receiving lens.

[0021] Further preferably, the supporting and adjusting component is a circuit board for soldering the light-emitting device; wherein, a part of the area on the circuit board located at the transmitting sleeve may be provided with a hollow area to allow the received light to pass through; and the circuit board also has scale lines.

[0022] Further preferably, glue injection holes are opened on opposite sides of the top of the installation groove, so that after the emitting lens is installed and the colloid is injected, the colloid extends along the groove surface of the installation groove to adhere to the circumferential interface of the emitting lens.

[0023] The present application also provides a distance measuring device, including: the above-mentioned light source device.

[0024] Further preferably, the distance measuring device is a photoelectric distance meter.

[0025] The present application also provides a method for installing the above light source device, comprising the following steps:

[0026] The transmitting lens and the receiving lens are coaxially arranged on the transmitting sleeve;

[0027] After fixing the light emitting device on the supporting and adjusting component, place it on the emitting sleeve;

[0028] Covering the bottom of the launch sleeve with a light shielding component so that the side wall of the launch sleeve forms an opening area for slidably adjusting the support adjustment component;

[0029] After the light emitting device is adjusted to a position coaxially arranged with the emitting lens and the receiving lens by moving the supporting and adjusting component, the supporting and adjusting component is fixed.

[0030] Compared with the prior art, the light source device and the distance measuring device provided by the present application can facilitate coaxial arrangement while avoiding light leakage from the back gap of the light-emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0032] Figure 1 : Schematic diagram of the working principle of the light source device in the first embodiment of the present invention;

[0033] Figure 2 : A schematic structural diagram of a first embodiment of the present invention in which the transmitting sleeve, the transmitting lens and the receiving lens are coaxially arranged;

[0034] Figure 3 : A schematic structural diagram of a launching sleeve in a first embodiment of the present invention;

[0035] Figure 4 : A schematic structural diagram of the combination of the launching sleeve and the supporting and adjusting component in the first embodiment of the present invention;

[0036] Figure 5 : A schematic diagram of the structure when the launching sleeve and the supporting and adjusting component are combined in a top view in the first embodiment of the present invention

[0037] Figure 6 : A schematic diagram of the three-dimensional structure of the light shielding component in the first embodiment of the present invention;

[0038] Figure 7 : A schematic cross-sectional view of the light shielding component in the first embodiment of the present invention;

[0039] Figure 8 : A schematic diagram of the three-dimensional structure of the launch sleeve and the supporting and adjusting component when they are combined in the first embodiment of the present invention;

[0040] Fig. 9 : A schematic structural diagram of the support and adjustment component embedded in the opening area in the first embodiment of the present invention;

[0041] Fig.10 : Another structural schematic diagram of the launching sleeve in the first embodiment of the present invention;

[0042] Fig.11 : Flow chart of the method for installing the light source device in the third embodiment of the present invention; Description of the drawings:

[0044] Light-emitting device 1, supporting and adjusting component 2, emitting lens 3, emitting sleeve 4, opening 41, groove 42, glue injection hole 43, central axis 13, receiving lens 5, photosensitive device 6, shading component 7, emitted light 8, outgoing light 9, reflected light 10, received light 11, light leakage 12, left gap 15, right gap 16, lower gap 17, cover body 70, chamfer 71, protrusion 72, sheet-like protrusion 73, connecting portion 75. DETAILED DESCRIPTION

[0045] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0046] Embodiment 1

[0047] like Figures 1 to 9As shown, the first embodiment of the present invention provides a light source device, which is mainly composed of a light emitting device 1, a transmitting lens 3, a receiving lens 5, a transmitting sleeve 4, a shading component 7, and a supporting and adjusting component 2. Among them, the transmitting sleeve 4 is used to set the light emitting device 1, and to make the transmitting lens 3 and the receiving lens 5 coaxially arranged. The shading component 7 is used to cover the bottom of the transmitting sleeve 4 so that the side wall of the transmitting sleeve 4 forms an opening area. The supporting and adjusting component 2 is at least partially embedded in the transmitting sleeve 4 through the opening area, and is used to support the light emitting device 1 and adjust the position of the light emitting device 1.

[0048] From the above content, it can be known that: since the emitting sleeve 4 of the light source device in this embodiment can be used to set the light-emitting device 1, and the emitting lens 3 and the receiving lens 5 are coaxially arranged, and after the shading component 7 covers the bottom of the emitting sleeve 4, the side wall of the emitting sleeve 4 forms an opening area, and at the same time, since the support adjustment component 2 can be embedded in the emitting sleeve 4 through the opening area to support and fix the light-emitting device 1, the position of the light-emitting device 1 in the emitting sleeve 4 can be adjusted by moving the position of the support adjustment component 2, so that it is convenient to achieve the coaxial arrangement of the light-emitting device 1 and the emitting lens 3 and the receiving lens 5, while avoiding that part of the light scattered by the light-emitting device 1 is emitted from the emitting sleeve 4 (reference Figure 1 The light leakage 12) leaks out.

[0049] Here, it should be noted that the coaxial arrangement in this embodiment means that the central axes of the light emitting device 1 of the transmitting lens 3, the receiving lens 5, and the transmitting sleeve 4 can be coaxially arranged, for example Figure 1 The axial coincidence arrangement shown by the central axis 13.

[0050] Specifically, Figure 1 As shown, in order to meet the assembly and design requirements in practical applications, a through hole for inserting the support and adjustment component 2 is provided on the side wall of the emission sleeve 4 in this embodiment. When the light shielding component 7 abuts against the support and adjustment component 2 and covers the bottom of the emission sleeve 4 in an interference fit manner, at least a portion of the through hole is covered by the light shielding component 7 and an opening area is formed. While the support and adjustment component 2 is moved and adjusted through the opening area, part of the light scattered by the light emitting device 1 is prevented from leaking out from the opening area.

[0051] Further preferably, Figure 4As shown, the through opening is an opening 41 extending upward from the bottom of the emission sleeve 4. This structural design facilitates the installation and position adjustment of the support and adjustment component 2 after being connected to the light emitting device 1. For example, by fixing the light emitting device 1 on the support and adjustment component 2, and then installing the shading component 7, and by adjusting the axial movement of the shading component 7 along the emission sleeve 4, the size of the opening area can be adjusted to achieve the limit adjustment of the support and adjustment component 2, so that the support and adjustment component 2 is embedded in the opening area without being easily loosened.

[0052] Further preferably, in order to meet the assembly and processing requirements in practical applications, the shading component 7 includes: a cover body 70 with a groove body for covering the bottom, a connecting part 75 connected to the cover body 70, etc. Among them, the connecting part 75 is provided with an embedding groove for inserting the support adjustment component 2.

[0053] In addition, it should be noted that the cover body 70 in this embodiment is preferably circular to match the shape of the bottom of the launch sleeve. Of course, the shape of the cover body 70 can also be other shapes, such as rectangular, etc., but it only needs to be compatible with the shape of the port at the bottom of the launch sleeve 4, and no further details will be given here.

[0054] like Figure 1 As shown, as a preferred method, in this embodiment, protrusions 72 expanding inward are provided on the opposite sides of the embedding groove, which are used to slidably connect the support adjustment component 2 and form a preset gap between the support adjustment component 2 and the opposite sides and bottom of the embedding groove to avoid the phenomenon of light leakage 12.

[0055] Further preferably, Fig. 9 As shown, the width of the preset gap is less than or equal to 0.5 mm. It is worth mentioning that the preset gap in this embodiment can be as follows Fig. 9 Shown are the left gap 15, the right gap 16 and the lower gap 17, which will not be specifically limited or described.

[0056] In addition, if Figure 6 and Figure 7 As shown, in order to meet the assembly and processing requirements in practical applications, a chamfered groove 71 is axially provided on the top of the side wall of the shading component 7 in this embodiment, which is used to form an interference fit after the support adjustment component 2 is inserted, and can facilitate the alignment and assembly between the shading component 7 and the launching sleeve 4.

[0057] Obviously, this embodiment can also be provided with a convex ring on the side wall of the shading component 7 to form an interference fit after the support adjustment component 2 is inserted. However, this embodiment is only briefly described by taking the chamfered groove 71 as an example without making any specific limitation.

[0058] In order to facilitate the adjustment of the support adjustment component 2 while moving in the axial direction vertical to the launching sleeve 4, that is, moving in the horizontal direction, and also realizing rotation adjustment, the cover body 70 may preferably be rotatably connected to the launching sleeve 4.

[0059] In addition, if Fig. 9 As shown, the cross-sectional shape of the embedded groove in this embodiment may preferably be U-shaped, so as to facilitate the assembly between the supporting and adjusting component 2 and the shading component 7 and the emitting sleeve 4, and to surround the supporting and adjusting component 2 to prevent weak light from overflowing from the edge of the supporting and adjusting component 2, and to retain a preset gap.

[0060] In addition, if Figure 6 As shown, in order to facilitate assembly and positioning in practical applications, the shading component 7 also includes: a sheet-like protrusion 73 disposed at the bottom of the cover body and connected to the cover body. For example, in practical applications, the sheet-like protrusion 73 can be clamped and positioned by a corresponding fixture, so as to facilitate automatic positioning and assembly of the shading component 7 and the launch sleeve 4. Obviously, the positioning and assembly can also be performed manually in this embodiment, and no specific limitation or redundant description will be made for this.

[0061] In addition, if Figure 1 As shown, in this embodiment, the inner surface of the cover body 70 is formed into a light absorbing layer by a matte process such as sandblasting and grinding. By providing the light absorbing layer, the emission light 8 scattered by the light emitting device 1 and emitted under the action of the emission sleeve 4 or the emission lens 3 can be better absorbed to form the leakage light 12, thereby avoiding the phenomenon of light leakage 12 caused by part of the light being transmitted through the gap between the light shielding component and the emission sleeve 4 and the bottom of the light shielding component 7 and the emission sleeve 4.

[0062] Further preferably, Figure 1 As shown, in order to meet the assembly and processing requirements in practical applications, a mounting groove 42 is provided in the transmitting sleeve 4. The light source device also includes: a transmitting lens 3 provided in the mounting groove 42; a receiving lens 5 coaxially sleeved outside the transmitting sleeve 4; and a photosensitive element 6 provided under the light shielding cover and used to receive the receiving light 11 refracted by the receiving lens 5.

[0063] Further preferably, Figure 1 As shown, the light emitting device 1 is a laser light source. After the emission light 8 emitted by the laser light source is refracted by the emission lens 3 to form the emission light 9, it is irradiated to the surface of the object and reflected to form the reflection light 10, and then the reflection light 10 is refracted by the receiving lens 5 to form the receiving light 11, and finally received by the photosensitive element at the bottom and converted into a light signal, so that the distance measuring device with the light source device can realize the accurate measurement of the object according to the light signal.

[0064] Further preferably, the supporting and adjusting component 2 is a circuit board for soldering the light emitting device 1 .

[0065] In addition, as a further preferred embodiment, a part of the area on the circuit board located at the transmitting sleeve may be provided with a hollow area or a hollow area (not shown in the figure) to allow the received light 11 to pass through, thereby reducing the blocking effect of the circuit board on the received light 11, so as to improve the measurement accuracy of the distance measuring device with a light source device. Obviously, the circuit board in this embodiment may not have a hollow area, and the width of the circuit board may be controlled to avoid the blocking effect of the circuit board on the received light 11.

[0066] In addition, it is worth mentioning that there are scale lines (not shown in the figure) on the circuit board in this embodiment, so as to facilitate the adjustment of the position of the support adjustment component 2 according to the scale lines.

[0067] Further preferably, Fig.10 As shown, glue injection holes 43 are provided on opposite sides of the top of the mounting groove 42, which are used to allow the colloid to extend along the groove surface of the mounting groove 42 after the emitting lens 3 is installed and the colloid is injected to adhere to the circumferential interface of the emitting lens 3, thereby avoiding the situation where the colloid is directly applied to the circumferential interface of the emitting lens 3, which may easily cause the mirror surface to be contaminated.

[0068] Embodiment 2

[0069] The present application also provides a distance measuring device, including: the light source device in the above-mentioned embodiment 1.

[0070] From the above content, it can be known that: since the transmitting sleeve 4 of the light source device of the ranging equipment provided in this embodiment can be used to set the light-emitting device 1, and the transmitting lens 3 and the receiving lens 5 are coaxially arranged, and after the shading component 7 covers the bottom of the transmitting sleeve 4, the side wall of the transmitting sleeve 4 forms an opening area, and at the same time, since the supporting and adjusting component 2 can be embedded in the transmitting sleeve 4 through the opening area to support and fix the light-emitting device 1, the position of the light-emitting device 1 in the transmitting sleeve 4 can be adjusted by moving the position of the supporting and adjusting component 2, so as to facilitate the coaxial arrangement of the light-emitting device 1 with the transmitting lens 3 and the receiving lens 5 while preventing part of the light scattered by the light-emitting device 1 from leaking out of the transmitting sleeve 4.

[0071] Specifically, the distance measuring device in this embodiment is preferably a photoelectric distance meter.

[0072] Embodiment 3

[0073] This embodiment also provides a method for installing the light source device in any of the above embodiments, such as Fig.11 As shown, the following steps are included:

[0074] Step S1: coaxially arranging the transmitting lens 3 and the receiving lens 5 on the transmitting sleeve 4;

[0075] Step S2: After fixing the light emitting device 1 on the supporting and adjusting component 2, place it on the emitting sleeve 4;

[0076] Step S3: Covering the bottom of the launch sleeve 4 with the light shielding component 7, so that the side wall of the launch sleeve 4 forms an opening area that can slidably adjust the support and adjustment component 2;

[0077] Step S4: After the light emitting device 1 is adjusted to a position coaxially arranged with the emitting lens 3 and the receiving lens 5 by moving the supporting and adjusting component 2, the supporting and adjusting component 2 is fixed.

[0078] The above steps can realize the assembly between the emitting sleeve 4 in the light source device and the supporting and adjusting component 2, the shading component 7 and the light-emitting device 1, which facilitates the adjustment of the light-emitting device 1 by the supporting and adjusting component 2, thereby facilitating the coaxial arrangement of the light-emitting device 1 with the emitting lens 3 and the receiving lens 5 while preventing part of the light scattered by the light-emitting device 1 from leaking out from the emitting sleeve 4.

[0079] In addition, it is worth mentioning that when the support adjustment component 2 adjusts the light-emitting device 1 to a coaxial setting position, after fixing the position of the support adjustment component 2 and the transmitting sleeve 4 by dispensing glue, the support adjustment component 2 and the transmitting sleeve 4 can be adjusted as a whole to move as a whole, so as to realize the coaxial setting of the photosensitive component, the light-emitting device 1, the transmitting lens 3 and the receiving lens 5.

[0080] The above embodiments are only used to illustrate the technical solution of the present invention but not to limit it. The present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, and all should be included in the scope of the claims of the present invention.

Claims

1. A light source device, comprising: The light emitting device, the transmitting lens and the receiving lens are characterized in that they also include: An emitting sleeve, used for arranging the light emitting device and making the emitting lens and the receiving lens coaxially arranged; A light shielding component, used to cover the bottom of the launch sleeve so that the side wall of the launch sleeve forms an opening area; A support and adjustment component, part of which is embedded in the emitting sleeve through the opening area, and is used to support the light-emitting device and adjust the position of the light-emitting device; The side wall of the launch sleeve is provided with a through hole for inserting the support and adjustment component; when the light shielding component abuts against the support and adjustment component and covers the bottom of the launch sleeve in an interference fit manner, at least a part of the through hole is covered by the light shielding component and forms the opening area; The light shielding component comprises: a cover body portion provided with a groove body for covering the bottom, and a connecting portion connected to the cover body portion; wherein the connecting portion is provided with an embedding groove for inserting the support and adjustment component, and the sliding direction of the support and adjustment component can be perpendicular to the axial direction of the launching sleeve; The opposite sides of the embedding groove are provided with protrusions expanding inwardly, which are used for sliding connection with the support adjustment component, and a preset gap is formed between the support adjustment component and the opposite sides and bottom of the embedding groove to prevent light leakage; The inner surface of the cover body is coated with a light absorbing coating or a light absorbing layer is formed by sandblasting and grinding.

2. The light source device according to claim 1, characterized in that: The through opening is an opening extending upward from the bottom of the launching sleeve.

3. The light source device according to claim 1, characterized in that: The width of the preset gap is less than or equal to 0.5 mm.

4. The light source device according to claim 1, characterized in that: A chamfered groove is axially provided on the top of the side wall of the shading component for forming the interference fit after the support adjustment component is inserted; or a convex ring is provided on the side wall of the shading component for forming the interference fit after the support adjustment component is inserted.

5. The light source device according to claim 4, characterized in that: The cover body can be rotatably connected to the launch sleeve; the cross-sectional shape of the embedding groove is U-shaped; the shading component also includes: a sheet-like protrusion arranged at the bottom of the cover body and connected to the cover body.

6. The light source device according to claim 1, characterized in that: The light emitting device is a laser emitter.

7. The light source device according to any one of claims 1 to 6, characterized in that: The transmitting sleeve is provided with a mounting groove; the light source device also includes: a transmitting lens arranged in the mounting groove; a receiving lens coaxially sleeved on the outside of the transmitting sleeve; and a photosensitive element arranged under the light shielding cover and used for receiving the receiving light refracted by the receiving lens.

8. The light source device according to claim 7, characterized in that: The supporting and adjusting component is a circuit board for welding the light-emitting device; wherein, a part of the area on the circuit board located at the transmitting sleeve can be provided with a hollow area to allow the received light to pass through; and there are also scale lines on the circuit board.

9. The light source device according to claim 7, characterized in that: Glue injection holes are provided on opposite sides of the top of the installation groove, which are used to allow the colloid to extend along the groove surface of the installation groove after the emitting lens is installed and the colloid is injected, so as to adhere to the circumferential interface of the emitting lens.

10. A distance measuring device, characterized in that: include: A light source device according to any one of claims 1 to 9.

11. The distance measuring device according to claim 10, characterized in that: The distance measuring device is a photoelectric distance meter.

12. A method for installing the light source device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The transmitting lens and the receiving lens are coaxially arranged on the transmitting sleeve; After fixing the light emitting device on the supporting and adjusting component, place it on the emitting sleeve; Covering the bottom of the launch sleeve with a light shielding component so that the side wall of the launch sleeve forms an opening area for slidably adjusting the support adjustment component; After the light emitting device is adjusted to a position coaxially arranged with the emitting lens and the receiving lens by moving the supporting and adjusting component, the supporting and adjusting component is fixed.

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