Lens module

Abstract

The invention provides a lens module. The lens module comprises a lens seat and a lens group which are integrated, the lens holder is composed of a fixing piece and a lens frame, the lens frame is connected with the fixing piece, and the lens frame comprises a containing cavity and a bearing face located in the containing cavity. The lens group is arranged in the accommodating cavity and leans against the bearing surface so as to ensure that no relative displacement is generated between the lens group and the lens frame. As the lens group is of an integrated structure, the number of components is reduced, and relative displacement cannot be generated between the fixing sheet and the lens holder. Therefore, the problem that the alignment quality is affected due to the fact that the relative positions of the split lens barrel and the base or the heat dissipation substrate deviate in the assembling process in the prior art can be avoided.

Description

Technical Field

[0001] The invention relates to an optical element, in particular to a lens module. Background Art

[0002] In order to increase the brightness of the vehicle's surroundings, most vehicles include multiple headlights or light source components to provide forward lighting. In addition, integrating small projection devices into headlights to project driving information has gradually become a mainstream design. Generally speaking, a headlight assembly includes a shell and multiple optical lens modules disposed inside the shell. The optical lens module includes a lens barrel and a lens group. In order to fix the optical lens module on the substrate, the lens assembly (or lens group) is usually combined with the lens barrel by positioning ribs or hot melt adhesive, and then the lens barrel, the base and the heat dissipation substrate are combined to ensure that there is no relative displacement between the lens assembly, the base and the substrate.

[0003] However, during the assembly of the lens assembly, it is very important to accurately fix the relative positions of the lens and the solid-state light source. Summary of the invention

[0004] The purpose of the present invention is to accurately fix the position of the lens and reduce the number of components.

[0005] To achieve the above object, the present invention provides a lens module, comprising:

[0006] An integrated lens holder, the lens holder being composed of a fixing plate and a lens holder, the lens holder being connected to the fixing plate, the lens holder comprising a receiving cavity and a bearing surface located in the receiving cavity; and

[0007] The lens group is arranged in the accommodating cavity and supported by the bearing surface.

[0008] Preferably, a heat sink is further included, which is arranged on the bottom surface of the fixing plate, and the heat sink includes a plurality of heat dissipation fins.

[0009] Further preferably, the fixing plate includes a first locking hole, the heat sink includes a second locking hole, and the first locking hole is opposite to the second locking hole.

[0010] More preferably, it further comprises a fixing piece, and the fixing piece is arranged in the first locking hole and the second locking hole.

[0011] Preferably, it also includes a fixed pressing plate, which is arranged around the lens group and is used to fix the lens group in the accommodating cavity.

[0012] More preferably, it further comprises a wavelength conversion element, which is arranged on the heat sink and exposed in the accommodating cavity.

[0013] Further preferably, the wavelength conversion element comprises a fluorescent material.

[0014] In order to achieve the above object, the present invention further provides a lens module, comprising:

[0015] An integrated lens holder, the lens holder is composed of a heat sink and a lens frame, the lens frame is connected to the heat sink, the lens frame includes a receiving cavity and a bearing surface located in the receiving cavity, and the heat sink includes a plurality of heat sink fins; and

[0016] The lens group is arranged in the accommodating cavity and supported by the bearing surface.

[0017] Preferably, it further comprises a wavelength conversion element, which is arranged on the heat sink and exposed in the accommodating cavity.

[0018] Further preferably, the wavelength conversion element comprises a fluorescent material.

[0019] Preferably, it also includes a fixed pressing plate, which is arranged around the lens group and is used to fix the lens group in the accommodating cavity.

[0020] In order to achieve the above object, the present invention further provides a lens module, comprising:

[0021] An integrated lens holder, the lens holder is composed of a heat sink and a lens holder, the lens holder is connected to the heat sink, and a slot is provided between the bottom surface of the lens holder and the top surface of the heat sink, the lens holder includes a receiving cavity and a bearing surface located in the receiving cavity, and the heat sink includes a plurality of heat sink fins; and

[0022] The lens group is arranged in the accommodating cavity and supported by the bearing surface.

[0023] Preferably, it further comprises a light source module and a circuit board, wherein the light source module is arranged on the circuit board, and the light source module and the circuit board are arranged in the slot.

[0024] Preferably, it also includes a fixed pressing plate, which is arranged around the lens group and is used to fix the lens group in the accommodating cavity.

[0025] Compared with the prior art, the present invention supports the lens group through an integrated lens holder, so as to accurately fix the position of the lens and reduce the number of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1A and Figure 1B They are respectively an exploded view of a lens module according to one embodiment of the present invention and an exploded view of a lens module according to another embodiment;

[0027] Figure 2 is a schematic diagram of the assembly of a lens module according to an embodiment of the present invention;

[0028] Figure 3 is an exploded view of a lens module according to another embodiment of the present invention;

[0029] Figure 4 It is an exploded view of a lens module according to another embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0031] Certain words are used in the specification and claims to refer to specific components. Those with ordinary knowledge in the field should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. The position descriptions such as up, down, top, and bottom mentioned in the specification are based on the directions marked in the drawings and the definition methods that people are accustomed to, to explain the positional relationship between the components, and do not limit the actual placement or use direction of the product. The "including" mentioned throughout the specification and claims is an open-ended term, so it should be interpreted as "including but not limited to".

[0032] Please refer to Figure 1A and Figure 1B . Figure 1A and Figure 1B The exploded view of the lens module 100 according to one embodiment of the present invention and the exploded view of the lens module 100 according to another embodiment are respectively shown. The lens module 100 includes an integrated lens seat 110 and a lens group 120. The lens seat 110 is composed of a fixing plate 112 and a lens frame 114. The lens frame 114 is connected to the fixing plate 112. The lens frame 114 includes a receiving cavity 115 and a bearing surface 117 located around the receiving cavity 115. The lens group 120 is disposed in the receiving cavity 115 and supported on the bearing surface 117.

[0033] Please refer to Figure 1A The bearing surface 117 includes a first bearing surface 117a and a second bearing surface 117b. The first bearing surface 117a is located on the top surface of the upper end of the accommodating cavity 115, and the second bearing surface 117b is located on the top surface of the lower end of the accommodating cavity 115. The first bearing surface 117a is located above the second bearing surface 117b, and the first bearing surface 117a and the second bearing surface 117b extend inward in a stepped manner, so that the first lens 121 and the second lens 122 in the lens group 120 can be supported on the first bearing surface 117a and the second bearing surface 117b respectively.

[0034] Please refer to Figure 1AThe bearing surface 117 may further include a first positioning rib 116a and a second positioning rib 116b. The first positioning rib 116a is located in the radial direction of the first bearing surface 117a and extends toward the accommodating cavity 115, and the second positioning rib 116b is located in the radial direction of the second bearing surface 117b and extends toward the accommodating cavity 115. The first positioning rib 116a is used to position the first lens 121 in the lens group 120 on the first bearing surface 117a, and the second positioning rib 116b is used to position the second lens 122 in the lens group 120 on the second bearing surface 117b.

[0035] In addition, please refer to Figure 1A and Figure 1B The lens module 100 may include a first fixing pressing plate 130 and a second fixing pressing plate 131, which are respectively disposed around the lens group 120. The first fixing pressing plate 130 is used to fix the first lens 121 in the lens group 120 on the first bearing surface 117a, and the second fixing pressing plate 131 is used to fix the second lens 122 in the lens group 120 on the second bearing surface 117b. Figure 1A As shown, the first fixing pressing piece 130 is, for example, an annular buckle, whose edge extends downward and has a buckle hole 132, and the periphery of the lens frame 114 has, for example, a buckle 118, which protrudes outside the lens frame 114 and is opposite to the buckle hole 132. Figure 2 As shown, when the engaging hole 132 of the first fixing pressing plate 130 is engaged with the fastener 118 , the first fixing pressing plate 130 can fix the lens group 120 on the lens frame 114 to ensure that no relative displacement occurs between the lens group 120 and the lens frame 114 .

[0036] In addition, the lens holder 110 is an integrated structure, for example, by plastic injection molding or metal die casting, to form a fixed sheet 112 and a lens frame 114 of a predetermined structure. The fixed sheet 112 is, for example, plate-shaped and has at least a first locking hole 113, and the lens frame 114 is, for example, barrel-shaped and has an opening (for example, a central opening) at its bottom. Since the lens holder 110 is an integrated structure, there will be no relative displacement between the fixed sheet 112 and the lens frame 114, thereby avoiding the relative position offset of the split lens barrel and the base in the prior art during the assembly process to affect the alignment quality.

[0037] In addition, please refer to Figure 1BThe lens module 100 may include a heat sink 140, and the heat sink 140 includes a second locking hole 142 and a plurality of heat sink fins 143. The heat sink 140 is disposed on the bottom surface of the fixing plate 112 to transfer heat to the heat sink fins 143 to accelerate cooling and heat dissipation. When the lens module 100 is assembled on the heat sink 140, the first locking hole 113 is opposite to the second locking hole 142, so that the lens module 100 is accurately positioned on the heat sink 140 to avoid relative position deviation during the assembly process and affect the alignment quality. Please refer to Figure 2 In one embodiment, a fixing member 146 (such as a screw or the like) is disposed in the first locking hole 113 and the second locking hole 142, and the fixing member 146 is used to fix the lens module 100 on the heat sink 140. In another embodiment, the lens module 100 may also be fixed on the heat sink 140 by hot melt adhesive or light curing adhesive, which is not limited by the present invention.

[0038] In addition, the lens module 100 may include a wavelength conversion element 144. The wavelength conversion element 144 is disposed in the accommodating cavity 115 to convert the wavelength of the incident light. The wavelength conversion element 144 may be a fluorescent material, for example, coated on the top surface of the heat sink 140 or attached to the heat sink 140. Figure 1B The bottom surface of the fixing plate 112 has an opening (not shown), and the wavelength conversion element 144 is disposed on the heat sink 140 and can be exposed in the opening. The wavelength conversion element 144 is located on the optical path of the lens group 120. When light is incident into the accommodating cavity 115 through the lens group 120, the wavelength conversion element 144 receives the energy of the incident light and generates excitation light, which is emitted to the outside of the lens group 120 through the lens group 120 to serve as an auxiliary light source.

[0039] In one embodiment, in the application field of the vehicle lamp assembly, the lens module 100 can be assembled in a vehicle lamp housing (not shown) to project driving information or auxiliary light source to help the driver understand the driving information or road conditions in front of the vehicle. However, in another embodiment, the lens module 100 can also be used in a projector or other electronic devices, and the present invention is not limited to this.

[0040] Please refer to Figure 3 . Figure 3 The exploded view of the lens module 101 according to another embodiment of the present invention is shown. The lens module 101 includes an integrated lens seat 110 and a lens group 120. The lens seat 110 is composed of a heat sink 140 and a lens frame 114. The lens frame 114 is connected to the heat sink 140. The lens frame 114 includes a receiving cavity 115 and a bearing surface 117 located in the receiving cavity 115. The heat sink 140 includes a plurality of heat dissipation fins 143. In addition, the lens group 120 is disposed in the receiving cavity 115 and supported on the bearing surface 117.

[0041] The present embodiment is different from the above-mentioned embodiment in that the lens holder 110 is molded by metal or other materials, for example, to form a heat sink 140 and a lens frame 114 of a predetermined structure. The heat sink 140 includes a plurality of heat sink fins 143, which are used to conduct heat to the heat sink fins 143 to accelerate cooling and heat dissipation. Since the heat sink 140 and the lens frame 114 do not need to be connected by a fixing plate, and the heat sink 140 and the lens frame 114 are directly connected without relative displacement, the relative position of the split lens barrel and the base or heat dissipation substrate in the prior art can be avoided to be offset during the assembly process, thereby affecting the alignment quality.

[0042] The structures of the accommodating cavity 115 and the bearing surface 117 and the buckle arrangement of the first / second fixing pressing plates 130 and 131 have been described in the above embodiments. Elements with the same functions are represented by the same or similar element symbols and will not be repeated here.

[0043] In addition, the lens module 101 may include a wavelength conversion element 144, which is configured in the same manner as Figure 1B As shown. The wavelength conversion element 144 is disposed in the accommodating cavity 115 to convert the wavelength of the incident light. The wavelength conversion element 144 may be a fluorescent material, for example, coated on the top surface of the heat sink 140 or attached to the heat sink 140. The fluorescent material can be irradiated by a certain wavelength of light (such as ultraviolet rays or x-rays) and absorb energy, and then release another longer wavelength of light (usually visible light), that is, visible fluorescence or excitation light. The fluorescent material may include inorganic luminescent particles made of yttrium aluminum garnet (yttrium aluminum garnet; YAG), which has a higher melting point than organic particles. Therefore, even when the inorganic luminescent particles are irradiated with high energy or exposed at high temperature, the inorganic luminescent particles are not easily damaged by thermal shock. In some embodiments, the inorganic luminescent particles can withstand high-power light irradiation (such as laser blue light) and have a higher thermal conductivity than organic materials, so that the wavelength conversion element 144 has better heat resistance.

[0044] In another embodiment, the fluorescent material may also include an organic light-emitting material or white functional particles to adjust the scattering path of the excitation light. The white functional particles may be made of aluminum oxide (Al2O3), titanium oxide (TiO2), zinc oxide (ZnO), zirconium oxide (ZrO2), tantalum oxide (Ta2O5) or other appropriate materials.

[0045] Please refer to Figure 4 . Figure 4The exploded view of the lens module 102 according to another embodiment of the present invention is shown. The lens module 102 includes an integrated lens holder 110 and a lens group 120. The lens holder 110 is composed of a heat sink 140 and a lens frame 114. The lens frame 114 is connected to the heat sink 140, and a slot 145 is provided between the bottom surface of the lens holder 114 and the top surface of the heat sink 140. The lens frame 114 includes a receiving cavity 115 and a bearing surface 117 located in the receiving cavity 115. The heat sink 140 includes a plurality of heat dissipation fins 143. In addition, the lens group 120 is disposed in the receiving cavity 115 and supported on the bearing surface 117.

[0046] The present embodiment is different from the above embodiment in that a slot 145 is provided between the heat sink 140 and the lens holder 114 so that a predetermined distance is provided between the bottom surface of the lens holder 114 and the top surface of the heat sink 140. Figure 4 As shown, the lens holder 110 is molded by metal or other materials to form a predetermined structure of the heat sink 140, the lens holder 114 and the slot 145. In the appearance of the heat sink 140, the central portion 140a of the heat sink 140 is thinner, and the two outer portions 140b of the heat sink 140 are thicker, so that the center of the heat sink 140 forms a notch, and the lens holder 114 is connected to the top of the slot 145 and connected between the two thicker outer portions 140b. Therefore, the slot 145 is formed between the bottom surface of the lens holder 114 and the top surface of the heat sink 140.

[0047] Since the heat sink 140 and the lens frame 114 do not need to be connected by a fixing plate and are directly connected without relative displacement, the relative position offset of the split lens barrel and the base or heat dissipation substrate during assembly in the prior art can be avoided to affect the alignment quality.

[0048] In one embodiment, the slot 145 is, for example, in a strip or flat shape, for accommodating an electronic device, which may be an optical element or an image sensing element, and the present invention is not limited thereto. Figure 4 , the electronic device may include a light source module 150 and a circuit board 152, the light source module 150 is disposed on the circuit board 152, and the light source module 150 and the circuit board 152 are disposed in the slot 145. In one embodiment, the light source module 150 is, for example, a solid-state light source or other types of light sources, and the solid-state light source is, for example, a light-emitting diode element, for generating projection light or light signals. In addition, a control chip (not shown) may be disposed on the circuit board 152 to provide the voltage signal and control signal required by the light source module 150 to control the light source module 150 to generate projection light or light signals.

[0049] In addition, the circuit board 152 can be fixed on the heat sink 140 by screwing or other methods, and the heat generated by the light source module 150 is conducted to the heat sink fins 143 through the heat sink 140 to accelerate cooling and heat dissipation.

[0050] In one embodiment, in the application field of the vehicle lamp assembly, the lens module 102 and the light source module 150 are combined into an electronic assembly and can be assembled in the vehicle lamp housing to project driving information or auxiliary light sources to help the driver understand the driving information or road conditions in front of the vehicle. However, in another embodiment, the lens module 102 and the light source module 150 can also be used in a projector or other electronic devices, and the present invention is not limited to this.

[0051] The structures of the accommodating cavity 115 and the bearing surface 117 and the buckle arrangement of the first / second fixing pressing plates 130 and 131 have been described in the above embodiments. Elements with the same functions are represented by the same or similar element symbols and will not be repeated here.

[0052] In summary, the lens module of the above embodiment of the present invention can fix the lens group in the accommodating cavity of the lens frame to ensure that there is no relative displacement between the lens group and the lens frame. In addition, since the lens seat is an integrated structure, the number of components is reduced, and there is no relative displacement between the fixing plate and the lens frame, or the heat sink and the lens frame are directly connected without relative displacement, it can avoid the relative position of the split lens barrel and the base or heat dissipation substrate in the prior art being offset during the assembly process to affect the alignment quality.

[0053] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A lens module, characterized in that: include: An integrated lens holder, the lens holder being composed of a fixing plate and a lens holder, the lens holder being connected to the fixing plate, the lens holder comprising a receiving cavity and a bearing surface located in the receiving cavity; and The lens group is arranged in the accommodating cavity and supported by the bearing surface.

2. The lens module according to claim 1, characterized in that: It also includes a heat sink, which is arranged on the bottom surface of the fixing plate, and the heat sink includes a plurality of heat sink fins.

3. The lens module according to claim 2, characterized in that: The fixing plate includes a first locking hole, the heat sink includes a second locking hole, and the first locking hole is opposite to the second locking hole.

4. The lens module according to claim 3, characterized in that: It also includes a fixing piece, which is arranged in the first locking hole and the second locking hole.

5. The lens module according to claim 1, wherein: It also includes a fixed pressing plate, which is arranged around the lens group and is used to fix the lens group in the accommodating cavity.

6. The lens module according to claim 2, characterized in that: It also includes a wavelength conversion element, which is arranged on the heat sink and exposed in the accommodating cavity.

7. The lens module according to claim 6, wherein: The wavelength conversion element includes a fluorescent material.

8. A lens module, characterized in that: include: An integrated lens holder, the lens holder is composed of a heat sink and a lens frame, the lens frame is connected to the heat sink, the lens frame includes a receiving cavity and a bearing surface located in the receiving cavity, and the heat sink includes a plurality of heat sink fins; and The lens group is arranged in the accommodating cavity and supported by the bearing surface.

9. The lens module according to claim 8, characterized in that: It also includes a wavelength conversion element, which is arranged on the heat sink and exposed in the accommodating cavity.

10. The lens module according to claim 9, characterized in that: The wavelength conversion element includes a fluorescent material.

11. The lens module according to claim 8, characterized in that: It also includes a fixed pressing plate, which is arranged around the lens group and is used to fix the lens group in the accommodating cavity.

12. A lens module, characterized in that: include: An integrated lens holder, the lens holder is composed of a heat sink and a lens holder, the lens holder is connected to the heat sink, and a slot is provided between the bottom surface of the lens holder and the top surface of the heat sink, the lens holder includes a receiving cavity and a bearing surface located in the receiving cavity, and the heat sink includes a plurality of heat sink fins; and The lens group is arranged in the accommodating cavity and supported by the bearing surface.

13. The lens module according to claim 12, wherein: It also includes a light source module and a circuit board. The light source module is arranged on the circuit board, and the light source module and the circuit board are arranged in the slot.

14. The lens module according to claim 12, wherein: It also includes a fixed pressing plate, which is arranged around the lens group and is used to fix the lens group in the accommodating cavity.

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