CN212111946U

CN212111946U - Endoscope focusing mechanism

Info

Publication number: CN212111946U
Application number: CN201922495461.1U
Authority: CN
Inventors: 王珍玮; 李宝华
Original assignee: Zhuhai Pusheng Medical Science & Technology Co ltd
Current assignee: Zhuhai Pusheng Medical Science & Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-12-08
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an endoscope focusing mechanism, which comprises a photosensitive chip, a shell, a lens cone and a plurality of lenses; the shell is covered above the photosensitive chip, the top surface of the shell is provided with a through hole, the upper surface of the shell is provided with at least two supporting blocks, and the lower end surfaces of the supporting blocks are inclined planes or curved surfaces inclining towards one side; the periphery of the lens cone is provided with at least two guide blocks, the upper end surfaces of the guide blocks and the lower end surfaces of the supporting blocks are inclined planes or curved surfaces which incline towards the same side, and when the lens cone is arranged in the through hole of the shell in a penetrating way, the guide blocks are pressed on the supporting blocks to enable the lens cone to be rotatably connected with the shell; the lenses are all fixed in the lens barrel. The supporting shoe can support the lens cone, utilizes the spiral design of supporting shoe and guide block, rotates the up-and-down motion that the lens cone can realize the lens cone to drive the lens and reciprocate, adjust the distance between lens and the sensitization chip, can adjust to suitable focus.

Description

Endoscope focusing mechanism

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an endoscope focusing mechanism.

Background

The optical system in the endoscope comprises a photosensitive chip and a lens, the distance between the photosensitive chip and the lens is different due to operation errors, and the positions of the lens and the photosensitive chip need to be adjusted, so that the focal length of the endoscope is proper, and the obtained image is clear. Some producers focus and be the distance of direct plug lens cone adjusting lens and sensitization chip, and this kind of regulation mode is inefficient, and is consuming time for a long time, hardly fixes after adjusting moreover. And the outer part of the shell of the lens is provided with an external thread, the shell of the photosensitive chip is provided with an internal thread, and the shell is driven to rotate by the matching of the internal thread and the external thread, so that the lens is moved.

Due to the small size of the endoscope, the processing of the thread is complex and the production is time-consuming. Moreover, as the thread is processed on the periphery of the lens barrel, the inner diameter of the lens barrel is reduced, the diameter of the lens is reduced, and the imaging quality is lowered; or the size of the shell is increased, so that the size of the tip part is increased, and the injury of the patient is easily caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome at least one technical problem of the above prior art, the utility model provides an endoscope focusing mechanism which can conveniently adjust the focal length, improve the picture quality and does not increase the size of the tip part.

The endoscope focusing mechanism comprises a photosensitive chip, a shell, a lens barrel and a plurality of lenses; the shell is covered above the photosensitive chip, the top surface of the shell is provided with a through hole, the upper surface of the shell is provided with at least two supporting blocks, and the lower end surfaces of the supporting blocks are inclined planes or curved surfaces inclining towards one side; the periphery of the lens cone is provided with at least two guide blocks, the upper end surfaces of the guide blocks and the lower end surfaces of the supporting blocks are inclined planes or curved surfaces which incline towards the same side, and when the lens cone is arranged in the through hole of the shell in a penetrating way, the guide blocks are pressed on the supporting blocks to enable the lens cone to be rotatably connected with the shell; the lenses are all fixed in the lens barrel.

The endoscope focusing mechanism at least has the following beneficial effects: be provided with the supporting shoe on the shell and can support the lens cone, utilize the connecting face slope of supporting shoe and guide block, rotate the up-and-down motion that the lens cone can realize the lens cone to drive the lens and reciprocate, adjust the distance between lens and the sensitization chip, can adjust to suitable focus, obtain clear image.

In some embodiments of the above endoscope focusing mechanism, the inclination angle or curvature of the upper end surface of the support block and the lower end surface of the guide block are the same. Whole accommodation process is swift convenient, and supporting shoe and guide block simple structure, the angle of slope the same can make the contact surface laminate completely, connects more reliably, rotates more smoothly.

In some embodiments of the above endoscope focusing mechanism, the supporting blocks are located at both sides of the through hole, and the guiding blocks are located at both sides of the lens barrel. The supporting blocks and the guide blocks are arranged on two sides, so that the connection strength of the lens cone and the shell can be increased, and the lens cone can move more stably and smoothly in the longitudinal direction.

In some embodiments of the above endoscope focusing mechanism, the supporting block is arc-shaped, the supporting block is disposed around the through hole, and when the lens barrel is inserted into the through hole of the housing, an inner surface of the supporting block is closely attached to an outer peripheral surface of the lens barrel. The structure can reduce the distance between the supporting block and the lens cone, reduce the space occupied by the supporting block and avoid increasing the size of the endoscope head.

In some embodiments of the above endoscope focusing mechanism, a lower limiting block which is separated or connected is arranged beside the supporting block, the lower limiting block is located on the lowest side of the upper end surface of the supporting block, and the upper end of the lower limiting block is higher than the lowest position of the upper end surface of the supporting block. When the guide block contacts with the supporting block, the lowest end of the guide block is abutted against the lower limiting block, and the lower limiting block prevents the guide block from sliding downwards along the spiral line, so that the limiting effect is achieved.

In some embodiments of the above endoscope focusing mechanism, the guide block is connected to an upper limiting block, the upper limiting block is located on the side where the lower end surface of the guide block is the highest, and the lower end of the upper limiting block is lower than the highest position of the lower end surface of the guide block. When the guide block contacts with the supporting block, the highest end of the supporting block is abutted against the upper limiting block, and the upper limiting block prevents the guide block from sliding downwards along the spiral line, so that the limiting effect is achieved.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the described figures are only some embodiments of the invention, not all embodiments, and other designs and figures can be obtained by those skilled in the art without inventive effort, based on these figures:

fig. 1 is a schematic structural view of a first embodiment of the present invention;

fig. 2 is a left side view of the first embodiment of the present invention;

fig. 3 is a left side view of a second embodiment of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, an endoscope focusing mechanism includes a photosensitive chip, a housing 2, a lens barrel 3 and a plurality of lenses, wherein the lenses are all fixed in the lens barrel 3. The top at the sensitization chip is established to the cover of shell 2, the top surface of shell 2 still is provided with the through-hole, the upper surface of shell 2 is provided with two at least supporting shoes 5, the lower terminal surface of supporting shoe 5 is towards the inclined plane or the curved surface of one side slope, the outer peripheral face of lens cone 3 is provided with two at least guide blocks 6, the inclined plane or the curved surface of homonymy slope are towards to the up end of guide block 6 and the lower terminal surface of supporting shoe 5, when lens cone 3 wears to establish in the through-hole of shell 2, guide block 6 roof pressure makes lens cone 3 and shell 2 rotatably be connected on supporting shoe 5.

Utilize the helical structure of supporting shoe 5 and the 6 contact surfaces of guide block, rotate lens cone 3 and can realize lens cone 3's up-and-down motion to drive lens and reciprocate, adjust the distance between lens and the sensitization chip, can adjust to suitable focus, obtain clear image, adjust convenient and fast moreover, shortened the degree of difficulty of equipment.

Because the photosensitive chip is square and the lens is round, the diameter of the lens is the same as the shortest side of the photosensitive chip under the ideal assembly condition, and the image in the largest range can be obtained while the size of the front end is ensured. Originally, the structure of providing the screw thread outside the lens barrel 3 can reduce the inner diameter of the lens barrel 3, thereby reducing the diameter of the lens. However, the support block 5 and the guide block 6 are used for connection, so that the space inside the lens barrel 3 is not required to be occupied, the inner diameter of the lens barrel 3 can be maximized, the diameter of the lens is increased, and a better picture is obtained. And supporting shoe 5 and guide block 6 simple structure, production and processing are simple than the screw thread, have improved the efficiency of production.

In the first and second embodiments of fig. 1 to 3, the upper end surface of the supporting block 5 and the lower end surface of the guiding block 6 are both inclined surfaces, the upper end surface of the supporting block 5 and the lower end surface of the guiding block 6 both spirally rise toward one side, the spiral directions of the upper end surface of the supporting block 5 and the lower end surface of the guiding block 6 are the same as the spiral rising angle, and when the lens barrel 3 is inserted into the through hole of the housing 2, the lower end surface of the guiding block 6 abuts against the upper end surface of the corresponding supporting block 5.

The supporting blocks 5 are located on two sides of the through hole, the guide blocks 6 are located on two sides of the lens cone, the supporting blocks 5 are arc-shaped, the supporting blocks 5 are arranged beside the through hole in a surrounding mode, and when the lens cone 3 penetrates through the through hole of the shell 2, the inner surfaces of the supporting blocks 5 are attached to the outer peripheral face of the lens cone 3. The supporting block 5 and the guide block 6 are positioned on two sides of the lens cone 3, so that the connection strength of the lens cone 3 and the shell 2 can be increased, the lens cone 3 can move more stably and smoothly in the longitudinal direction, the supporting block 5 can be close to the lens cone 3 as far as possible by the surrounding arrangement, the space occupied by the supporting block 5 is reduced, and the size of the tip part of the endoscope is reduced.

According to the first embodiment shown in fig. 1 and 2 of the specification, an upper limiting block 61 is arranged beside the guide block 6, the upper limiting block 61 is positioned on the side where the lower end surface of the guide block 6 is the highest, and the lower end of the upper limiting block 61 is lower than the highest position of the lower end surface of the guide block 6. In an embodiment not shown in the drawings, the upper limiting block 61 may be provided on the outer wall of the lens barrel 3 separately from the guide block 6.

According to the second embodiment shown in fig. 3 in the specification, a lower limiting block 51 is arranged beside the supporting block 5, the lower limiting block 51 is positioned on the lowest side of the upper end surface of the supporting block 5, and the upper end of the lower limiting block 51 is higher than the lowest position of the upper end surface of the supporting block 5.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An endoscope focusing mechanism, characterized by: comprises that

A photosensitive chip;

the shell (2) covers the photosensitive chip (1), the top surface of the shell is provided with a through hole, the upper surface of the shell is provided with at least two supporting blocks (5), and the lower end surfaces of the supporting blocks (5) are inclined planes or curved surfaces inclining towards one side;

the lens cone (3), the perimeteric surface of the said lens cone (3) has at least two guide blocks (6), the upper end of the guide block (6) and bottom end of the supporting shoe (5) are towards the inclined plane or curved surface that the homonymy slopes, when the lens cone (3) is worn and set up in the through hole of the outer casing (2), the guide block (6) is pressed against the supporting shoe (5) and made the lens cone (3) connect with outer casing (2) rotatably;

and the lenses are all fixed in the lens barrel (3).

2. The endoscope focusing mechanism of claim 1 wherein: the lower end face of the supporting block (5) and the upper end face of the guide block (6) have the same inclination angle or curvature.

3. The endoscope focusing mechanism of claim 1 wherein: the supporting blocks (5) are located on two sides of the through hole, and the guide blocks (6) are located on two sides of the lens cone.

4. The endoscope focusing mechanism of claim 1 wherein: the supporting block (5) is arc-shaped, the supporting block (5) is arranged beside the through hole in a surrounding mode, and when the lens cone (3) penetrates through the through hole of the shell (2), the inner surface of the supporting block (5) is attached to the outer peripheral surface of the lens cone (3).

5. The endoscope focusing mechanism of claim 2 wherein: the supporting block (5) is provided with a lower limiting block (51) which is separated or connected with each other, the lower limiting block (51) is positioned on the lowest side of the upper end surface of the supporting block (5), and the upper end of the lower limiting block (51) is higher than the lowest position of the upper end surface of the supporting block (5).

6. The endoscope focusing mechanism of claim 2 wherein: the guide block (6) is connected with an upper limiting block (61), the upper limiting block (61) is located on the side, with the highest end face, of the lower end face of the guide block (6), and the lower end of the upper limiting block (61) is lower than the highest position of the lower end face of the guide block (6).