Handheld device and focusing device

Abstract

The utility model relates to the technical field of imaging equipment, and particularly discloses handheld equipment and a focusing device, which comprise a shell, a focusing lens and a focusing component. Wherein the shell is provided with a through hole; the focusing lens is telescopically arranged on the shell along the optical axis direction; the focusing component is movably arranged in the shell, at least part of the focusing component is exposed out of the through hole, and the focusing component is connected with the focusing lens and used for driving the focusing lens to stretch out and draw back in the optical axis direction so as to adjust the focal length. According to the handheld device and the focusing device provided by the utility model, the internal space of the shell is fully utilized, the occupation of the external space of the shell is reduced, the overall size is further reduced, and thinning of the device is facilitated. Besides, the focusing component is hidden in the shell, and the focusing lens does not need to protrude out of the shell, so that the focusing lens is not easy to touch when falling off, and the performance reliability of the equipment is ensured. The integrality is high, no protruding special shape exists, the harmony and the visual sense are better, and the competitive advantage of the product is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of imaging equipment, and more specifically to a handheld equipment and a focusing device. Background Art

[0002] Handheld devices are widely used in consumer electronics, home appliance testing, outdoor and other fields due to their portability, and consumers have increasingly stringent requirements on the product's appearance, overall coordination, ease of use, size, etc.

[0003] Infrared handheld observation equipment is a commonly used handheld equipment, which can be divided into fixed focus, manual adjustment and electric adjustment. Traditional manual adjustment equipment has the lens protruding from the device surface, and a focus ring is set outside the lens. When focusing, the user pinches the focus ring with his fingers. However, since the manual adjustment action requires the protruding length of the lens to meet the finger operation space, the product's outer envelope size is large, and it will cause the device to be irregular, and the overall appearance of the product is not coordinated.

[0004] In summary, how to effectively solve the problem of large size of handheld devices is a problem that those skilled in the art need to solve. Utility Model Content

[0005] In view of this, an object of the present invention is to provide a handheld device and a focusing device, the structural design of which can effectively solve the problem of large external dimensions of the handheld device.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A focusing device, comprising:

[0008] A housing, wherein the housing is provided with a through hole;

[0009] A focusing lens is telescopically arranged on the housing along the optical axis direction;

[0010] A focusing component is movably disposed in the housing, and at least a portion of the focusing component is exposed from the through hole. The focusing component is connected to the focusing lens and is used to drive the focusing lens to extend and retract along the optical axis to adjust the focal length.

[0011] Optionally, in the above-mentioned focusing device, the focusing component is arranged outside the focusing lens, and the focusing component can rotate relative to the shell, the rotation of the focusing component can drive the focusing lens to extend and retract along the optical axis direction, and the through hole is arranged on the side wall of the shell.

[0012] Optionally, in the above-mentioned focusing device, the focusing component is fixedly connected to the focusing lens, and the focusing component can rotate relative to the housing and move axially relative to the housing.

[0013] Optionally, in the above-mentioned focusing device, the focusing component is threadedly connected to the housing;

[0014] or,

[0015] One of the focusing component and the housing is provided with a slide groove, and the other is provided with a protrusion matched with the slide groove. When the focusing component rotates around the axial direction, the protrusion moves along the slide groove and causes the focusing component to move axially.

[0016] Optionally, in the above-mentioned focusing device, the focusing component is a focusing ring, and the focusing ring includes:

[0017] A main body, which is sleeved outside the focusing lens, the housing includes a mounting seat sleeved outside the main body, the outer circumference of the main body is provided with an external thread matched with the mounting seat, or the outer circumference of the main body is provided with the protrusion or the slide groove;

[0018] The flange is arranged on the main body and extends radially along the main body, and the outer end of the flange is exposed from the through hole.

[0019] Optionally, in the above-mentioned focusing device, the focusing component is rotatably provided on the housing, the focusing component is rotatably connected to the focusing lens, and the rotation of the focusing component relative to the focusing lens can be converted into extension and retraction of the focusing lens along the optical axis direction.

[0020] Optionally, in the above-mentioned focusing device, the focusing component is located inside the shell.

[0021] Optionally, in the above focusing device, the focusing component protrudes from the through hole;

[0022] Alternatively, the outer end of the focusing component is located in the through hole or is flush with the outer end or inner end of the through hole;

[0023] Alternatively, the focusing component is located inside the housing and has a distance from the through hole.

[0024] The focusing device provided by the utility model comprises a housing, a focusing lens and a focusing component. The housing is provided with a through hole; the focusing lens is telescopically arranged in the housing along the optical axis; the focusing component is movably arranged in the housing, and at least part of the focusing component is exposed through the through hole, and the focusing component is connected to the focusing lens, and is used to drive the focusing lens to telescopically adjust along the optical axis to adjust the focal length.

[0025] The focusing device provided by the utility model is applied, a through hole is provided on the shell, and the focusing component is provided in the shell and can be exposed through the through hole. Then, when focusing, the user can operate the focusing component through the through hole to drive the focusing lens to extend and retract along the optical axis to achieve focusing. As set up as above, the internal space of the shell and the radial length space of the lens itself are fully utilized. The focusing lens does not need to protrude from the shell to provide space for user operation, so the space occupied by the outside of the shell is reduced, thereby reducing the overall size, which is conducive to achieving thinning of the equipment. In addition, the focusing component is hidden inside the shell, and the focusing lens does not need to protrude from the shell. Therefore, it is not easy to touch the focusing lens when it falls, so the optical axis direction of the focusing lens is not easy to tilt due to collision, thereby ensuring the performance reliability of the equipment. And it has high integrity, no protruding shapes, better coordination and visual senses, and increases the competitive advantage of the product.

[0026] In order to achieve the above object, the utility model also provides a handheld device, which includes any one of the above focusing devices. Since the above focusing device has the above technical effects, the handheld device having the focusing device should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the structure of a handheld device according to a specific embodiment of the utility model;

[0029] Figure 2 is a top view schematic diagram of a handheld device;

[0030] Figure 3 is a schematic side view of a handheld device;

[0031] Figure 4 is a schematic diagram of the main view of a handheld device;

[0032] Figure 5 for Figure 4 AA cross-section diagram of ;

[0033] Figure 6 for Figure 5 A partial enlarged schematic diagram of .

[0034] Reference numerals:

[0035] 1-housing; 2-focusing lens; 3-focusing component; 4-matching lens; 5-thread;

[0036] 11-through hole; 12-mounting seat; 13-recessed portion; 14-side wall;

[0037] 31-main body; 32-flange; 321-operating part;

[0038] Figure 4 and Figure 5 The dotted line in the middle shows the optical path of the focusing lens and the matching lens. DETAILED DESCRIPTION

[0039] The embodiment of the utility model discloses a handheld device and a focusing device, which can reduce the external dimensions of the handheld device.

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] The handheld device provided by the present application includes but is not limited to an infrared handheld device, and is particularly suitable for a multi-light fusion handheld device. The multi-light in the present application includes dual light and above. In the process of realizing the present application, the inventor found that the handheld device in the prior art has at least the following problems. On the one hand, the traditional design of focal length adjustment is based on the part of the lens protruding from the shell to perform manual focusing action. Due to the manual adjustment action, the protruding length is required to conform to the operable space of human fingers, so there are certain requirements for the protruding length, which will cause the device to be irregular, with poor overall coordination and poor visual perception. On the other hand, for a multi-light fusion handheld device, taking the infrared lens and the visible light lens as an example, the infrared lens is provided with a manual adjustment structure so that the infrared lens is significantly higher than the visible light lens, which will have certain restrictions on the optical field of view of visible light and infrared. Specifically, when dual light fusion is performed, the barrel wall of the infrared lens will cause a certain degree of occlusion to the visible light path. In order to solve this problem, the relative distance between the infrared lens and the visible light lens needs to be increased, thereby increasing the overall length of the device in disguise. On the other hand, in order to meet operational requirements, the focusing lens is usually completely protruded from the device's exterior surface. If the device falls, the optical axis of the focusing lens may easily tilt, thereby causing functional abnormalities in the device.

[0042] In order to at least partially solve the defects of the above-mentioned handheld device, the present application provides a handheld device and a focusing device thereof, which utilizes lateral focusing to meet the design requirements while maintaining the minimum size of the product appearance, so that the overall appearance of the product is coordinated and beautiful, the product focusing is easy to use, and the limitations of multi-light alignment can be removed.

[0043] In some embodiments, see Figure 1-Figure 6 The focusing device provided by the utility model includes a housing 1, a focusing lens 2 and a focusing component 3. Among them, the housing 1 is provided with a through hole 11, and the housing 1 may include a housing of a handheld device. By providing the through hole 11 thereon, the user can try the focusing operation through the through hole 11. The specific shape of the through hole 11 can be set accordingly according to the focusing component 3, and is not specifically limited here. The focusing lens 2 is telescopically arranged on the housing 1 along the optical axis direction, that is, the focusing lens 2 can achieve focal length adjustment by telescoping along the optical axis direction. The focusing lens 2 can specifically be an infrared lens, a visible light lens, etc., and its type is not specifically limited. The telescopic stroke size of the specific focusing lens 2 can be set accordingly according to the focusing needs. The focusing component 3 can be movably arranged in the housing 1, and at least part of the focusing component 3 is exposed by the through hole 11. In this embodiment, the focusing component 3 is hidden inside the housing 1, that is, the focusing component 3 is installed using the internal space of the housing 1, and the focusing component 3 is exposed from the through hole 11 on the housing 1 to meet the operation needs. It should be noted that the exposure mentioned here and below refers to that at least part of the focusing component 3 is opposite to the through hole 11, which includes that the focusing component 3 is inserted into the through hole 11, and that the focusing component 3 is located inside the housing 1 and has a spacing with the through hole 11, and the spacing is greater than zero, and its specific value can be set as needed. Specifically, the focusing component 3 protrudes from the through hole 11, or the outer end of the focusing component 3 is located in the through hole 11, or the outer end of the focusing component 3 is flush with the outer end or inner end of the through hole 11; or the focusing component 3 is located inside the housing 1 and has a spacing with the through hole 11. The focusing component 3 is connected to the focusing lens 2, and is used to drive the focusing lens 2 to move axially to adjust the focal length. It can be understood that the focusing component 3 can be used as a part of the focusing lens 2, such as the focusing component 3 and the lens barrel of the focusing lens 2 are integrally formed, or it can be a component independent of the focusing lens 2. The user can operate the focusing component 3 through the through hole 11, thereby driving the focusing lens 2 to extend and retract along the optical axis to achieve focusing.

[0044] When the focusing device provided by the utility model is applied, a through hole 11 is provided on the housing 1, and the focusing component 3 is provided in the housing 1 and can be exposed through the through hole 11. Then, when focusing, the user can operate the focusing component 3 through the through hole 11 to drive the focusing lens 2 to extend and retract along the optical axis direction to achieve focusing. As set up as above, the internal space of the housing 1 is fully utilized, and the focusing lens 2 does not need to protrude from the housing 1 to provide space for user operation, so the external space occupied by the housing 1 is reduced, thereby reducing the overall size, which is conducive to achieving thinning of the device. In addition, the focusing component 3 is hidden inside the housing 1, and the focusing lens 2 does not need to protrude from the housing 1, so it is not easy to touch the focusing lens 2 when it falls, so the optical axis direction of the focusing lens 2 is not easy to tilt due to collision, thereby ensuring the performance reliability of the equipment. And it has high integrity, no protruding shapes, better coordination and visual senses, and increases the competitive advantage of the product. In addition, when used in a multi-light fusion device, the focusing lens 2 and the other lenses can be maintained at the same height in the direction of the optical axis. Therefore, when performing multi-light fusion, the barrel wall of the focusing lens 2 will not block the other light paths, thereby shortening the relative distance between the focusing lens 2 and the other lenses in disguise, thereby reducing the overall size of the device.

[0045] In some embodiments, the focusing component 3 is arranged outside the focusing lens 2, and the focusing component 3 can rotate relative to the housing 1. The rotation of the focusing component 3 can drive the focusing lens 2 to extend and retract along the optical axis, and the through hole 11 is arranged on the side wall 14 of the housing 1. In this embodiment, the focusing component 3 is arranged outside the focusing lens 2, and the focusing lens 2 is driven to extend and retract along the optical axis by the rotation of the focusing component 3. The focusing component 3 can rotate relative to the housing 1, including the focusing component 3 directly connected to the housing 1 for rotation, and the focusing component 3 is connected to other structures and can rotate relative to the housing 1, such as the focusing component 3 is installed on the focusing lens 2, etc. When the traditional hand-adjusting ring is used for focusing, the rotation is carried out by pinching the finger, so there are certain ergonomic size requirements for the pinching part. In this embodiment, the focusing component 3 is arranged in the housing 1, which can utilize the internal space of the housing 1, and has a large outer diameter. When the user rotates the focusing component 3, it relies on the friction between the finger surface and the focusing component 3 to move, which significantly reduces the requirements for the operating size, and thus the thickness of the device can be more effectively reduced.

[0046] In some embodiments, the focusing component 3 is fixedly connected to the focusing lens 2, and the focusing component 3 can rotate relative to the housing 1 and move axially relative to the housing 1. In this embodiment, the focusing component 3 is fixed to the focusing lens 2, and the movement of the focusing component 3 drives the focusing lens 2 to move synchronously. It should be noted that the focusing component 3 is fixedly connected to the focusing lens 2, which includes both being integrally formed, that is, the focusing component 3 and the lens barrel of the focusing lens 2 are integrally formed, which has a simple structure and is easy to assemble, and also includes the two being fixed by conventional methods such as bonding and clamping. The focusing component 3 can rotate relative to the housing 1, and the relative rotation of the two can be converted into relative axial movement. Therefore, when the user rotates the focusing component 3, the focusing component 3 moves axially at the same time, thereby driving the focusing lens 2 to rotate while telescoping along the optical axis direction to achieve focal length adjustment. As set above, the connection structure is simple and easy to install.

[0047] In some embodiments, the focusing component 3 is threadedly connected to the housing 1. That is, threads 5 are respectively provided on the focusing component 3 and the housing 1, and the characteristics of the threads 5 that can move forward and backward when rotating are utilized to achieve focusing. When the user operates, the focusing component 3 is rotated, and the focusing component 3 is threadedly connected to the housing 1, so the focusing component 3 moves axially while rotating, thereby driving the focusing lens 2 to synchronously extend and retract along the optical axis direction to achieve focusing. The threaded connection can not only realize the rotational connection between the focusing component 3 and the housing 1, but also realize the stepless adjustment of the axial direction, and the focusing accuracy is high.

[0048] In some embodiments, one of the focusing component 3 and the housing 1 is provided with a slide groove, and the other is provided with a protrusion that cooperates with the slide groove. When the focusing component 3 rotates around the axial direction, the protrusion moves along the slide groove and causes the focusing component 3 to move axially. This embodiment is different from the above-mentioned threaded cooperation between the focusing component 3 and the housing 1 in that, in this embodiment, a slide groove is provided on one of the mating surfaces of the focusing component 3 and the housing 1, and a protrusion is provided on the other. It can be understood that the focusing component 3 is rotated and moved axially at the same time by the cooperation of the slide groove and the protrusion, that is, when the focusing component 3 rotates, the slide groove cooperates with the protrusion to cause the focusing component 3 to move axially. By adopting the cooperation of the slide groove and the protrusion, a small part of the structure of the focusing component 3 and the housing 1 can be improved, which is convenient for processing. Specifically, the inner circumferential surface of the housing 1 is provided with a slide groove, and the outer wall of the focusing component 3 is provided with a protrusion, and the slide groove extends in a spiral.

[0049] In some embodiments, the focusing component 3 is a focusing ring that is sleeved outside the focusing lens 2. The focusing component 3 is annular and sleeved outside the focusing lens 2. The larger the outer diameter of the focusing component 3, the larger the user operation surface it provides, and the user can save more effort when rotating the focusing component 3. The focusing component 3 is annular, which is convenient for the user to realize multiple rotations of it, thereby facilitating the adjustment of a wider range of focal length. In other embodiments, the focusing component 3 can also adopt an annular part, that is, a non-enclosed structure that cooperates with the housing 1, and can also realize the corresponding focal length adjustment within the rotation range.

[0050] In some embodiments, the focus ring includes a main body 31 and a flange 32. The main body 31 is sleeved on the outside of the focusing lens 2, and the housing 1 includes a mounting seat 12 sleeved on the outside of the main body 31. The outer peripheral surface of the main body 31 is provided with an external thread that matches the mounting seat 12, or the outer peripheral surface of the main body 31 is provided with a protrusion or a slide groove; the flange 32 is provided on the main body 31 and extends along the radial direction of the main body 31, and the outer end of the flange 32 is exposed by the through hole 11. It can be understood that the mounting seat 12 and the housing 1 can be an integrated structure, that is, the mounting seat 12 is a part of the housing 1, or the mounting seat 12 can also be a separate part independent of the housing 1, and the mounting seat 12 is connected to the housing 1, that is, the focus ring is connected to the housing 1 through the mounting seat 12. The main body 31 is sleeved between the focusing lens 2 and the mounting seat 12. Specifically, it can be an integrated structure with the lens barrel of the focusing lens 2 to facilitate the rotational connection between the main body 31 and the mounting seat 12. Specifically, when the main body 31 and the mounting seat 12 are connected by threads, threads 5 are respectively set on the matching surfaces of the two. When the two adopt the matching of slide grooves and protrusions, matching slide grooves and protrusions are distributed on the matching surfaces of the two. By setting a flange 32 on the main body 31, the flange 32 extends radially, and the outer end of the flange 32 corresponds to the through hole 11, which is convenient for user operation. In summary, through the matching of the main body 31 and the flange 32, the main body 31 is convenient for the connection between the focusing lens 2 and the mounting seat 12, and the protruding flange 32 provides an operating end for the user. The overall structure is compact, the space occupancy is small, and the connection is stable and reliable.

[0051] In some embodiments, the flange 32 is plate-shaped, and the outer end of the flange 32 has an operating portion 321 extending in the axial direction. That is, the flange 32 is L-shaped, one side of which extends in the radial direction of the focusing lens 2, and the other side extends in the axial direction, so as to provide a larger operating surface for the user, and the cavity structure between the two sides not only reduces the occupation of the overall space inside the housing 1, but also has a light weight, which is conducive to the lightweight design of the handheld device.

[0052] In some embodiments, the focusing component 3 is rotatably disposed on the housing 1, the focusing component 3 is rotatably connected to the focusing lens 2, and the rotation of the focusing component 3 relative to the focusing lens 2 can be converted into the extension and retraction of the focusing lens 2 along the optical axis. In the above embodiment, the focusing component 3 is fixedly connected to the focusing lens 2 and can rotate relative to the housing 1. The difference between this embodiment and the above embodiment is that the focusing component 3 is rotatably connected to the focusing lens 2, and the focusing component 3 is rotatably disposed on the housing 1, and the axial direction of the focusing component 3 is limited by the housing 1. When focusing, the user can rotate the focusing component 3. Since the axial direction of the focusing component 3 is limited by the housing 1, the focusing component 3 can only rotate but not move axially. In addition, the focusing component 3 cooperates with the focusing lens 2, so the rotation of the focusing component 3 is converted into the extension and retraction of the focusing lens 2 along the optical axis, that is, it can drive the focusing lens 2 to extend and retract along the optical axis to achieve focusing. The specific rotational connection method between the focusing component 3 and the focusing lens 2 can refer to the rotational connection method between the focusing component 3 and the housing 1, such as the focusing component 3 and the focusing lens 2 are connected by threads, or by matching a slide groove with a protrusion.

[0053] In some embodiments, the outer wall surface of the focusing component 3 is provided with a mesh pattern to increase friction with the user's fingers and further facilitate the user's focusing operation. In the case where the focusing component 3 includes a flange 32 , the mesh pattern is provided on the outer peripheral surface of the flange 32 .

[0054] In some embodiments, the focusing component 3 is located inside the housing 1. The traditional focusing structure is located outside the housing 1, and relies on the pinching force of the fingers to achieve focusing. There are certain ergonomic size requirements for the pinching part, so the lens protrudes more from the housing 1. In the present application, the focusing component 3 is hidden inside the housing 1, so the focusing lens 2 does not need to protrude from the housing 1, so it can be located inside the housing 1 as a whole, so that when it falls, the focusing lens 2 will not be touched, avoiding the tilt of the optical axis caused by this, and ensuring the performance reliability of the device.

[0055] In some embodiments, the focusing component 3 protrudes from the through hole 11. That is, the outermost end of the focusing component 3 protrudes from the outer end of the through hole 11. The protruding setting is convenient for user operation, and the focusing can be directly operated manually without the aid of tools.

[0056] In some embodiments, see Figure 2, the side wall 14 of the housing 1 is provided with a recessed portion 13 which is concave inward, the through hole 11 is provided in the recessed portion 13, and the outer end of the focusing component 3 protrudes from the recessed portion 13 and is flush with or located inside the outer end of the side wall 14 outside the recessed portion 13. It can be understood that the side wall 14 outside the recessed portion 13 refers to the part of the side wall 14 on the side where the recessed portion 13 is provided except the recessed portion 13, which is flush with or exceeds the outer end of the focusing component 3. By providing the recessed portion 13 on the side wall 14 of the housing 1, the outer end of the focusing component 3 can be made to protrude from the through hole 11 while not exceeding the outermost side wall 14 of the housing 1. On the one hand, it is convenient for the user to operate the focusing component 3, and on the other hand, when it falls, the focusing component 3 is not easily hit, that is, the housing 1 can protect the focusing component 3, so the focusing component 3 is not easily damaged or tilted axially, further improving the reliability of the handheld device.

[0057] Based on the focusing device provided in the above embodiments, the present invention further provides a handheld device, which includes any one of the focusing devices in the above embodiments. Since the handheld device adopts the focusing device in the above embodiments, please refer to the above embodiments for the beneficial effects of the handheld device.

[0058] In some embodiments, the handheld device also includes a matching lens 4 that matches the focusing lens 2, and the optical axis of the matching lens 4 is parallel to the optical axis of the focusing lens 2. The matching lens 4 can be a lens with a fixed focal length or a lens with an adjustable focal length. The matching lens 4 can cooperate with the focusing lens 2 to achieve dual-light fusion. Specifically, one of the focusing lens 2 and the matching lens 4 is an infrared lens, and the other is a visible light lens, such as the focusing lens 2 is an infrared lens, and the matching lens 4 is a visible light lens. In this embodiment, the focusing component 3 adopts the above-mentioned setting hidden in the shell 1, and the focusing lens 2 does not need to protrude from the shell 1, so the optical paths of the focusing lens 2 and the matching lens 4 are not easily affected by the other lens, so the distance between the two can be smaller, so that dual-light fusion can be better achieved.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A focusing device, characterized in that: include: A housing (1), wherein the housing (1) is provided with a through hole (11); A focusing lens (2) is telescopically arranged on the housing (1) along the optical axis direction; A focusing component (3) is movably disposed in the housing (1), and at least a portion of the focusing component (3) is exposed from the through hole (11); the focusing component (3) is connected to the focusing lens (2) and is used to drive the focusing lens (2) to extend and retract along the optical axis to adjust the focal length.

2. The focusing device according to claim 1, characterized in that: The focusing component (3) is arranged outside the focusing lens (2), and the focusing component (3) can rotate relative to the housing (1); the rotation of the focusing component (3) can drive the focusing lens (2) to extend and retract along the optical axis direction; and the through hole (11) is arranged on a side wall (14) of the housing (1).

3. The focusing device according to claim 2, characterized in that: The focusing component (3) is fixedly connected to the focusing lens (2), and the focusing component (3) can rotate relative to the housing (1) and simultaneously move axially relative to the housing (1).

4. The focusing device according to claim 3, characterized in that: The focusing component (3) is threadably connected to the housing (1); or, One of the focusing component (3) and the housing (1) is provided with a slide groove, and the other is provided with a protrusion that cooperates with the slide groove, and when the focusing component (3) rotates axially, the protrusion moves along the slide groove and causes the focusing component (3) to move axially.

5. The focusing device according to claim 4, characterized in that: The focusing component (3) is a focusing ring, and the focusing ring comprises: A main body (31) is sleeved outside the focusing lens (2), the housing (1) comprises a mounting seat (12) sleeved outside the main body (31), the outer peripheral surface of the main body (31) is provided with an external thread matching with the mounting seat (12), or the outer peripheral surface of the main body (31) is provided with the protrusion or the slide groove; A flange (32) is provided on the main body (31) and extends radially along the main body (31), with an outer end of the flange (32) exposed from the through hole (11).

6. The focusing device according to claim 2, characterized in that: The focusing component (3) is rotatably arranged on the housing (1), the focusing component (3) is rotatably connected to the focusing lens (2), and the rotation of the focusing component (3) relative to the focusing lens (2) can be converted into the extension and retraction of the focusing lens (2) along the optical axis direction.

7. The focusing device according to any one of claims 1 to 6, characterized in that: The focusing lens (2) is located inside the housing (1).

8. The focusing device according to any one of claims 1 to 6, characterized in that: The focusing component (3) protrudes from the through hole (11); Alternatively, the outer end of the focusing component (3) is located inside the through hole (11) or is flush with the outer end or the inner end of the through hole (11); Alternatively, the focusing component (3) is located inside the housing (1) and is spaced apart from the through hole (11).

9. A handheld device, characterized in that: It comprises a focusing device as described in any one of claims 1 to 8.

10. The handheld device according to claim 9, characterized in that: It also comprises a matching lens (4) matching with the focusing lens (2), wherein the optical axis of the matching lens (4) is parallel to the optical axis of the focusing lens (2).

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