Large-variable-pitch high-precision laser lighting device

Abstract

The invention discloses a large-variable-pitch high-precision laser lighting device. Comprising a device cylinder body, a light source component, a variable pitch component and a follow-up connecting piece. The device cylinder is provided with a cylinder peripheral wall and a cylinder built-in space, and a cylinder linear groove is formed in the cylinder peripheral wall. The light source component is arranged in the built-in space of the barrel and is provided with a laser and a moving lens, the moving lens is composed of a lens seat and a lens, and a screw hole is formed in the peripheral surface of the lens seat. The pitch changing component is provided with a rotating outer cylinder, the rotating outer cylinder is arranged on the outer side of the peripheral wall of the cylinder body and can rotate along the peripheral wall of the cylinder body, and an outer cylinder spiral groove is formed in the rotating outer cylinder. And the follow-up connecting piece is provided with a screw rod part in the screw hole, a roller part in the spiral groove of the outer cylinder and a polished rod part in the linear groove of the cylinder body. The beneficial effects of the invention are that the problems of light-weight design, easy clamping stagnation in the zooming process, low zooming precision and the like in the case of large variable-pitch stroke are solved.

Description

Technical Field

[0001] The invention relates to the field of laser lighting, in particular to a large-variable-distance high-precision laser lighting device. Background Art

[0002] With the development of laser lighting technology, the projection distance, zoom ratio, zoom accuracy and smoothness of the zoom process of continuous zoom laser lighting devices are increasingly challenged.

[0003] The existing zoom mechanisms include: micro screw guide sliding zoom mechanism, cam cylindrical guide zoom mechanism, and cam slideway zoom mechanism. Although the micro screw guide zoom mechanism occupies a small space and is not easy to get stuck during the zoom process, it has high requirements for the precision of the micro guide used. Especially when the volume of the laser lighting device is high and the pitch change stroke is long, higher requirements are placed on the design and installation precision of the micro guide and the screw. The cam single cylindrical guide and cam double cylindrical guide zoom mechanisms have high zoom precision, but the zoom process often gets stuck. If linear rollers are used to solve the jamming problem, the product volume and weight will inevitably increase, which is not conducive to the lightweight design of the product. The cam three cylindrical guide zoom mechanism cannot meet the zoom precision requirements due to the large number of guides and large installation errors. The cam slideway zoom mechanism has sliding friction between the guide column and the cam groove, so when the pitch change stroke is long, it will inevitably get stuck. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the zoom mechanism of the laser lighting device in the prior art is prone to getting stuck, and to provide a new type of high-precision laser lighting device with large variable distance.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a technical solution: a large-pitch high-precision laser lighting device, comprising: a device barrel, a light source component, a pitch-changing component and a follower connection member; the device barrel has a barrel circumferential wall and a built-in barrel space, the barrel circumferential wall is formed with a barrel linear groove extending along the axial direction of the device barrel; the light source component is inside the built-in barrel space, the light source component has a laser and a moving lens, the moving lens is composed of a lens seat and a lens, the lens seat is arranged inside the barrel circumferential wall and can be displaced along the barrel circumferential wall, and the outer peripheral surface of the lens seat is formed with a screw hole; the pitch-changing component has a rotating outer cylinder, the rotating outer cylinder is arranged outside the barrel circumferential wall and can rotate along the barrel circumferential wall, the rotating outer cylinder is formed with an outer cylinder spiral groove extending along the axial direction of the device barrel; the follower connection member has a screw portion inside the screw hole, a roller portion inside the outer cylinder spiral groove and a light rod portion inside the barrel linear groove.

[0006] As a preferred solution of the large-variable-distance and high-precision laser illumination device, the light source component further includes a fixed lens 1 and a fixed lens 2. The laser, the fixed lens 1, the moving lens and the fixed lens 2 are arranged in sequence along the axis direction of the device cylinder and coaxially installed.

[0007] As a preferred solution of the large-variable-distance and high-precision laser illumination device, the variable-distance component further includes a driving motor, a driving gear and a driven gear. The output shaft of the driving motor is fixedly connected to the driving gear. The driven gear is formed on the outer peripheral surface of the rotating outer cylinder. The driving gear meshes with the driven gear. The driving motor can drive the rotating outer cylinder to rotate along the circumferential wall of the cylinder through the driving gear and the driven gear.

[0008] As a preferred solution of the large-variable-distance and high-precision laser illumination device, it further includes a position sensing component. The position sensing component includes an optocoupler and a single-point opposed fiber optic sensor. The single-point opposed fiber optic sensor is a groove type optoelectronic switch. The single-point opposed fiber optic sensor is relatively stationary with respect to the device cylinder. The optocoupler is fixed on the outer peripheral surface of the rotating outer cylinder and is synchronized with the rotating outer cylinder.

[0009] As a preferred solution of the large-variable-distance and high-precision laser illumination device, the number of the screw holes is 3, and they are evenly arranged along the circumferential direction; the number of the linear grooves on the cylinder is 3, and they are evenly arranged along the circumferential direction; the number of the screw grooves on the outer cylinder is 3, and they are evenly arranged along the circumferential direction; the number of the follower connectors is 3, and each of the follower connectors has its corresponding screw hole, linear groove on the cylinder and screw groove on the outer cylinder.

[0010] Compared with the prior art, the beneficial effects of the present invention are at least as follows: solving problems such as lightweight design, easy jamming during the variable magnification process and low variable magnification precision in the case of a large variable-distance stroke. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the present invention.

[0012] Figure 2 is a schematic structural diagram of the device cylinder of the present invention.

[0013] Figure 3 is a schematic structural diagram of the rotating outer cylinder of the present invention.

[0014] Figure 4 is a schematic structural diagram (stereoscopic schematic) of the moving lens of the present invention.

[0015] Figure 5 is a schematic structural diagram (sectional schematic) of the moving lens of the present invention.

[0016] Figure 6It is a schematic structural diagram of the follow-up connecting member of the present invention.

[0017] Figure 7 It is a schematic structural diagram of the optocoupler of the present invention. Specific embodiments

[0018] The present invention will be further described in detail below with reference to the accompanying drawings through specific embodiments. It should be noted here that the description of these embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] Please refer to Figure 1 , what is shown in the figure is a large variable magnification high-precision laser illumination device.

[0020] The large variable magnification high-precision laser illumination device includes: a device cylinder body 1, a light source component 2, a variable magnification component 3, a follow-up connecting member 4, etc.

[0021] Combined with Figure 2 , the device cylinder body 1 has a cylinder bottom wall 11, a cylinder peripheral wall 12, and a cylinder internal space 13 with a top opening jointly formed by the cylinder bottom wall 11 and the cylinder peripheral wall 12. The cylinder peripheral wall 12 is formed with a cylinder straight groove 121 extending along the axis direction of the device cylinder body 1. The opposite ends of the cylinder straight groove 121 are closed ends.

[0022] The light source component 2 is inside the cylinder internal space 13. The light source component 2 has a laser 21, a fixed lens one 22, a moving lens 23, and a fixed lens two 24. The laser 21, the fixed lens one 22, the moving lens 23, and the fixed lens two 24 are arranged in sequence along the axis direction of the device cylinder body 1 and are coaxially installed. The light beam generated when the laser 21 works exits outward after passing through the fixed lens one 22, the moving lens 23, and the fixed lens two 24 in sequence. Among them, the laser 21, the fixed lens one 22, and the fixed lens two 24 are all fixed, while the moving lens 23 can move along the axis direction of the device cylinder body 1, thereby realizing optical zoom.

[0023] In some embodiments, the laser 21 is fixed on the cylinder bottom wall 11, the fixed lens one 22 is fixed at the front end of the laser 21, and the fixed lens two 24 is fixed at the top opening position.

[0024] In some embodiments, the laser 21 can be a single semiconductor laser 21 or an array type semiconductor laser 21.

[0025] In some embodiments, the fixed lens 1-22 can be a single lens or a lens group composed of two or more lenses.

[0026] In some embodiments, the movable lens 23 can be a single lens or a lens group composed of two or more lenses.

[0027] In some embodiments, the fixed lens 2-24 can be a single lens or a lens group composed of two or more lenses.

[0028] Combined with Figure 3 , the variable-distance component 3 has a rotating outer cylinder 31. The rotating outer cylinder 31 is sleeved outside the peripheral wall 12 of the cylinder body. The rotating outer cylinder 31 can rotate along the peripheral wall 12 of the cylinder body. The rotating outer cylinder 31 is formed with an outer cylinder spiral groove 311 extending along the axis direction of the device cylinder body 1. The opposite ends of the outer cylinder spiral groove 311 are closed.

[0029] Combined with Figure 4 and Figure 5 , the movable lens 23 has a lens holder 231 and a lens 232 fixed inside the lens holder 231. The lens holder 231 is arranged inside the peripheral wall 12 of the cylinder body and can displace along the peripheral wall 12 of the cylinder body. The lens holder 231 is formed with a screw hole 2311.

[0030] Combined with Figure 6 , the follower connecting member 4 has a screw rod portion 41, a roller portion 42, and a smooth rod portion 43 between the screw rod portion 41 and the roller portion 42. The screw rod portion 41, the smooth rod portion 43, and the roller portion 42 are fixedly connected in sequence. The screw rod portion 41 is inside the screw hole 2311, that is, the follower connecting member 4 is fixedly connected to the lens holder 231. The smooth rod portion 43 is inside the linear groove 121 of the cylinder body. The roller portion 42 is inside the outer cylinder spiral groove 311 of the rotating outer cylinder 31.

[0031] Since the smooth rod portion 43 is inside the linear groove 121 of the cylinder body, that is, the follower connecting member 4 can only make a linear displacement. Rotate the rotating outer cylinder 31, and the outer cylinder spiral groove 311 of the rotating outer cylinder 31 drives the roller portion 42 of the follower connecting member 4, so that the lens holder 231 displaces to change the distance between the movable lens 23 and the fixed lens 1-22 (the fixed lens 2-24). Since the rolling displacement between the roller of the follower connecting member 4 and the outer cylinder spiral groove 311 can achieve smooth zooming.

[0032] In some embodiments, the pitch-changing component 3 further includes a drive motor 32, a driving gear 33, and a driven gear 34. The driven gear 34 is formed on the outer peripheral surface of the rotating outer cylinder 31, that is, a circle of convex teeth is provided on the outer peripheral surface of the rotating outer cylinder 31. The output shaft of the drive motor 32 is fixedly connected to the driving gear 33. The driving gear 33 meshes with the driven gear 34. The drive motor 32 can drive the rotation of the rotating outer cylinder 31 through the driving gear 33 and the driven gear 34. That is, the movement of the moving lens 23 is controlled by the drive motor 32.

[0033] In some embodiments, in combination with Figure 7 , the large-pitch high-precision laser illumination device further includes a position sensing component 5. The displacement sensing component 5 includes an optocoupler 51 and a single-point opposed fiber optic sensor 52. The single-point opposed fiber optic sensor 52 is a high-precision groove-type optoelectronic switch. The single-point opposed fiber optic sensor 52 is stationary relative to the device cylinder 1. The optocoupler 51 is fixed on the outer peripheral surface of the rotating outer cylinder 31 and can rotate synchronously with the rotating outer cylinder 31. The optocoupler 51 is provided with an interference portion 512 and a waist-shaped through hole 511 for facilitating fine adjustment of installation. At the zero pitch-changing position, the optocoupler 51 and the single-point opposed fiber optic sensor 52 are installed in a staggered manner, and the relative position can be finely adjusted. When the control module receives an interference signal from the single-point opposed fiber optic sensor, it determines that this moment is the zero pitch-changing reference position, ensuring the accuracy of the entire pitch-changing process.

[0034] In some embodiments, the number of the outer cylinder spiral grooves 311 is 3, which are evenly arranged in the circumferential direction. The number of the cylinder linear grooves 121 is 3, which are evenly arranged in the circumferential direction. The number of the screw holes 2311 is 3, which are evenly arranged in the circumferential direction. The number of the follower connectors 4 is 3. Each of the follower connectors 4 has its corresponding screw hole 2311, cylinder linear groove 121, and outer cylinder spiral groove 311.

[0035] The above only expresses the embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A large variable magnification and high-precision laser illumination device, characterized in that, include: The device barrel, the light source component, the variable pitch component and the follower connecting piece; the device barrel has a barrel peripheral wall and a built-in barrel space, the barrel peripheral wall is formed with a barrel linear groove extending along the axial direction of the device barrel; the light source component is inside the built-in barrel space, the light source component has a laser and a moving lens, the moving lens is composed of a lens seat and a lens, the lens seat is arranged inside the barrel peripheral wall and can be displaced along the barrel peripheral wall, and the outer peripheral surface of the lens seat is formed with a screw hole; the variable pitch component has a rotating outer cylinder, the rotating outer cylinder is arranged outside the barrel peripheral wall and can rotate along the barrel peripheral wall, and the rotating outer cylinder is formed with an outer cylinder spiral groove extending along the axial direction of the device barrel; the follower connecting piece has a screw rod part inside the screw hole, a roller part inside the outer cylinder spiral groove and a light rod part inside the barrel linear groove.

2. The large variable magnification and high-precision laser illumination device according to claim 1, characterized in that, The light source component further comprises a fixed lens 1 and a fixed lens 2. The laser, the fixed lens 1, the moving lens and the fixed lens 2 are sequentially arranged along the axis direction of the device cylinder and are coaxially installed.

3. The large variable magnification and high-precision laser illumination device according to claim 2, characterized in that, The laser is a single semiconductor laser or an array semiconductor laser.

4. The large variable magnification and high-precision laser illumination device according to claim 2, characterized in that, The fixed lens 1 is a single lens or a lens group consisting of two or more lenses.

5. The large variable magnification and high-precision laser illumination device according to claim 2, characterized in that, The motion lens is a single lens or a lens group consisting of two or more lenses.

6. The large variable magnification and high-precision laser illumination device according to claim 2, characterized in that, The second fixed lens is a single lens or a lens group consisting of two or more lenses.

7. The large variable magnification and high-precision laser illumination device according to claim 1, characterized in that, The pitch-changing component further comprises a driving motor, a driving gear and a driven gear, wherein the output shaft of the driving motor is fixedly connected to the driving gear, the driven gear is formed on the outer peripheral surface of the rotating outer cylinder, the driving gear is meshed with the driven gear, and the driving motor can drive the rotating outer cylinder to rotate along the peripheral wall of the cylinder body through the driving gear and the driven gear.

8. The large variable magnification and high-precision laser illumination device according to claim 1, characterized in that, Further including: The position sensing component comprises an optical coupler and a single-point optical fiber sensor. The single-point optical fiber sensor is a slot-type photoelectric switch. The single-point optical fiber sensor is relatively stationary with respect to the device cylinder. The optical coupler is fixed on the outer circumference of the rotating outer cylinder and is synchronized with the rotating outer cylinder.

9. The large variable magnification and high-precision laser illumination device according to claim 1, characterized in that, There are 3 screw holes, which are evenly arranged along the circumferential direction; there are 3 straight grooves on the cylinder, which are evenly arranged along the circumferential direction; there are 3 spiral grooves on the outer cylinder, which are evenly arranged along the circumferential direction; there are 3 follower connectors, and each follower connector has its corresponding screw hole, straight groove on the cylinder and spiral groove on the outer cylinder.

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