A focusing module with improved structure

Abstract

The present invention discloses a structurally improved focusing module, which includes a casing connection base, a clamping ring, a movable focusing wheel, a movable focusing ring and a ball bearing; the casing connection base is provided with a base light-transmitting through hole, the casing connection base is provided with a base connection ring and a base limit stop shoulder, and an external thread is provided at the upper end of the outer circumferential surface of the base connection ring; the inner circumferential surface of the clamping ring is provided with a clamping ring internal thread, and the clamping ring internal thread is screwed with the external thread of the base connection ring; the movable focusing wheel is in the shape of a ring, the ball bearing and the center hole of the movable focusing wheel are interference fit, and the inner ring of the ball bearing is limited between the clamping ring and the base limit stop shoulder; the movable focusing ring is located at the upper end side of the movable focusing wheel, and the movable focusing ring is connected to the upper end of the movable focusing wheel, and a focusing ring light-transmitting through hole is provided in the middle position of the movable focusing ring. Through the above structural design, the present invention has the advantages of novel structural design, good stability and reliability, and focusing without false focus.

Description

Technical Field

[0001] The present invention relates to the technical field of optical devices, and in particular to a focusing module with an improved structure. Background Art

[0002] For a camera, during the process of taking photos or videos, in order to ensure the clarity of the photos or images taken, the camera lens of the camera needs to be focused during use.

[0003] It should be pointed out that for the lens modules of existing cameras, serious out-of-focus phenomenon will occur during the focusing process, which will affect the camera quality and make it difficult to meet the high-quality and high-precision image quality requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a focusing module with an improved structure in view of the deficiencies in the prior art. The focusing module with an improved structure has a novel structural design, good stability and reliability, and can focus without false focus.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions.

[0006] A focus adjustment module with improved structure, comprising a housing connection base, a clamping ring, a movable focus adjustment wheel, a movable focus adjustment ring and a ball bearing;

[0007] A base light-transmitting through hole that completely penetrates from top to bottom is opened in the middle position of the housing connection base, and a base connection ring that protrudes upward and is in the shape of a ring is arranged on the periphery of the base light-transmitting through hole. An external thread is arranged on the upper end of the outer circumference of the base connection ring, and a base limit stop shoulder is arranged on the lower end of the outer circumference of the base connection ring;

[0008] The clamping ring is in the shape of a circular ring, and the inner circumferential surface of the clamping ring is provided with a clamping ring internal thread, and the clamping ring internal thread of the clamping ring is screwed with the external thread of the base connecting circular ring;

[0009] The movable focusing wheel is in the shape of a circular ring, the movable focusing wheel is located on the periphery of the base connecting ring, and the movable focusing wheel and the base connecting ring are arranged at intervals, the ball bearing is embedded in the center hole of the movable focusing wheel, and the ball bearing and the center hole of the movable focusing wheel are interference fit; the ball bearing is sleeved on the periphery of the base connecting ring, and the inner ring of the ball bearing is clamped and limited between the clamping ring and the base limit stop shoulder;

[0010] The movable focusing ring is located on the upper end side of the movable focusing wheel, and the movable focusing ring is connected to the upper end of the movable focusing wheel. A focusing ring light-transmitting through hole is opened in the middle position of the movable focusing ring, which is completely penetrated from top to bottom and aligned with the base light-transmitting through hole connected to the base of the casing. The inner wall of the focusing ring light-transmitting through hole is provided with a focusing ring internal thread.

[0011] Wherein, a focusing wheel limit stop shoulder protruding inward is provided at the lower end of the inner circumferential surface of the movable focusing wheel, and the lower surface of the outer ring of the ball bearing contacts the focusing wheel limit stop shoulder.

[0012] Wherein, the base connecting ring and the casing connecting base are an integrated structure.

[0013] Wherein, the upper end portion of the movable focus wheel is threadedly connected to the edge portion of the movable focus ring through a locking screw.

[0014] Wherein, the outer wall of the movable focusing wheel is provided with a groove.

[0015] The beneficial effects of the present invention are as follows: the focusing module with improved structure described in the present invention comprises a casing connecting base, a clamping ring, a movable focusing wheel, a movable focusing ring and a ball bearing; a base light-transmitting through hole which completely penetrates from top to bottom is provided in the middle position of the casing connecting base, a base connecting ring which protrudes upward and is in the shape of a circular ring is provided on the periphery of the base light-transmitting through hole, an external thread is provided on the upper end portion of the outer circumferential surface of the base connecting ring, and a base limiting shoulder is provided on the lower end portion of the outer circumferential surface of the base connecting ring; the clamping ring is in the shape of a circular ring, and a clamping ring internal thread is provided on the inner circumferential surface of the clamping ring, and the clamping ring internal thread of the clamping ring is screwed with the external thread of the base connecting ring; the movable focusing wheel It is in the shape of a circular ring, the movable focusing wheel is located at the periphery of the base connecting ring and the movable focusing wheel and the base connecting ring are arranged at intervals, the ball bearing is embedded in the center hole of the movable focusing wheel and the ball bearing and the center hole of the movable focusing wheel are interference fit; the ball bearing is sleeved on the periphery of the base connecting ring, and the inner ring of the ball bearing is limited between the clamping ring and the base limit stop shoulder; the movable focusing ring is located on the upper end side of the movable focusing wheel, and the movable focusing ring is connected to the upper end of the movable focusing wheel, and the middle position of the movable focusing ring is provided with a focusing ring light-transmitting through hole that completely penetrates up and down and is aligned with the base light-transmitting through hole that connects the housing to the base, and the inner wall of the focusing ring light-transmitting through hole is provided with a focusing ring internal thread. Through the above structural design, the present invention has the advantages of novel structural design, good stability and reliability, and focusing without false focus. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with the aid of the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the decomposition of the present invention.

[0019] Figure 3 It is a cross-sectional schematic diagram of the present invention.

[0020] exist Figures 1 to 3 Included are:

[0021] 1——Casing connection base 11——Base light-transmitting through hole

[0022] 12——Base connecting ring 13——External thread

[0023] 14——Base limit stop shoulder 2——Snap ring

[0024] 21——Internal thread of retaining ring 3——Active focusing wheel

[0025] 31——Groove 4——Active focus ring

[0026] 41——Light-transmitting hole of focusing ring 42——Internal thread of focusing ring

[0027] 5——Ball bearing 6——Locking screw. DETAILED DESCRIPTION

[0028] The present invention is described below in conjunction with specific implementation methods.

[0029] like Figures 1 to 3 As shown, a focus module with improved structure includes a housing connection base 1, a clamping ring 2, a movable focus wheel 3, a movable focus ring 4 and a ball bearing 5.

[0030] Furthermore, a base light-transmitting through hole 11 is provided in the middle of the housing connection base 1, and a base connection ring 12 protruding upward and extending in a circular ring shape is provided on the periphery of the base light-transmitting through hole 11. An external thread 13 is provided on the upper end of the outer circumference of the base connection ring 12, and a base limit stop shoulder 14 is provided on the lower end of the outer circumference of the base connection ring 12. Preferably, the base connection ring 12 and the housing connection base 1 are an integral structure.

[0031] Furthermore, the clamping ring 2 is in a circular ring shape, and the inner circumferential surface of the clamping ring 2 is provided with a clamping ring internal thread 21 , and the clamping ring internal thread 21 of the clamping ring 2 is threadedly connected with the external thread 13 of the base connecting ring 12 .

[0032] Among them, the movable focusing wheel 3 is in the shape of a circular ring, the movable focusing wheel 3 is located on the periphery of the base connecting ring 12 and the movable focusing wheel 3 and the base connecting ring 12 are arranged at intervals, the ball bearing 5 is embedded in the center hole of the movable focusing wheel 3 and the ball bearing 5 and the center hole of the movable focusing wheel 3 are interference fit; the ball bearing 5 is mounted on the periphery of the base connecting ring 12, and the inner ring of the ball bearing 5 is clamped and limited between the clamping ring 2 and the base limit shoulder 14.

[0033] In addition, the movable focusing ring 4 is located on the upper end side of the movable focusing wheel 3, and the movable focusing ring 4 is connected to the upper end of the movable focusing wheel 3. A focusing ring light-transmitting through hole 41 is provided in the middle position of the movable focusing ring 4, which completely penetrates from top to bottom and is aligned with the base light-transmitting through hole 11 of the housing connecting base 1. The inner wall of the focusing ring light-transmitting through hole 41 is provided with a focusing ring internal thread 42.

[0034] When the ball bearing 5 is embedded in the center hole of the movable focus wheel 3, in order to realize the positioning of the ball bearing 5, the present invention adopts the following positioning structure design, specifically: the lower end of the inner circumference of the movable focus wheel 3 is provided with a focus wheel limit stop shoulder protruding inward, and the lower surface of the outer ring of the ball bearing 5 contacts the focus wheel limit stop shoulder. During installation, when the outer ring of the ball bearing 5 contacts the focus wheel limit stop shoulder, it means that the ball bearing 5 is installed in place.

[0035] As a preferred embodiment, Figures 1 to 3 As shown, the upper end of the movable focusing wheel 3 is screwed to the edge of the movable focusing ring 4 by a locking screw 6; of course, the above-mentioned screwed assembly method does not constitute a limitation to the present invention, that is, the upper end of the movable focusing wheel 3 of the present invention can also be assembled and connected with the movable focusing ring 4 by a buckle connection.

[0036] As a preferred embodiment, Figure 1 and Figure 2 As shown, the outer wall of the movable focus wheel 3 is provided with a groove 31. When the user manually rotates the movable focus wheel 3, the groove 31 structure can effectively increase the friction force when the finger acts, thereby increasing the convenience of manually rotating the movable focus wheel 3.

[0037] It is necessary to further explain that, for the housing connection base 1 of the present invention, it is locked and installed on the housing of the camera lens; wherein, the housing connection base 1 can be fastened and installed with the housing of the camera lens by screwing or snapping. For the lens assembly of the camera lens, it is installed in the focus ring light-transmitting through hole 41 of the movable focus ring 4, and the above-mentioned lens assembly is screwed with the adjustment ring internal thread on the inner wall of the focus ring light-transmitting through hole 41 through the external thread; it is necessary to point out that the lens assembly of the camera lens can only move up and down, and cannot rotate.

[0038] When the present invention is used for manual focusing, the user manually rotates the movable focusing wheel 3, and the movable focusing ring 4 rotates synchronously with the movable focusing wheel 3. Since the internal thread of the inner wall of the focusing ring light-transmitting hole 41 is threadedly connected with the external thread of the lens assembly, during the rotation of the movable focusing ring 4, the thread rotation depth between the movable focusing ring 4 and the lens assembly will change. Since the movable focusing ring 4 is fixed and cannot move in the Z-axis direction, it will push the lens assembly to move in the Z-axis direction, thereby realizing the lens focusing operation.

[0039] It should be further emphasized that the roller bearing is assembled in the center hole of the movable focusing wheel 3 by means of interference fit, that is, the ball bearing 5 and the movable focusing wheel 3 will not move in the Z-axis direction; in addition, the ball bearing 5 is sleeved on the periphery of the base connection ring 12, and the inner ring of the ball bearing 5 is clamped and limited by the base limit shoulder 14 and the clamping ring 2, that is, the ball bearing 5 and the housing connection base 1 will not move in the Z-axis direction. During operation, in any situation such as motion, stillness, external force compression or vibration, the Z-axis direction of the ball bearing 5 will never change, and the movable focusing ring 4 will have no movement in the Z-axis and always remain in the initial position, thereby effectively avoiding the phenomenon of false focus.

[0040] In addition, during the rotation of the movable focusing wheel 3 , since the ball bearing 5 is installed between the movable focusing wheel 3 and the base connecting ring 12 , the ball bearing 5 can effectively improve the smoothness of the rotation of the movable focusing wheel 3 .

[0041] In summary, it can be seen that, through the above structural design, the present invention has the advantages of novel structural design, good stability and reliability, and focusing without false focus.

[0042] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A focusing module with improved structure, characterized in that: It comprises a housing connection base (1), a clamping ring (2), a movable focusing wheel (3), a movable focusing ring (4) and a ball bearing (5); A base light-transmitting through hole (11) which completely penetrates from top to bottom is provided in the middle of the housing connection base (1); a base connection circular ring (12) which protrudes upward and is in the shape of a circular ring is provided on the periphery of the base light-transmitting through hole (11); an external thread (13) is provided on the upper end of the outer circumference of the base connection circular ring (12); and a base limit stop shoulder (14) is provided on the lower end of the outer circumference of the base connection circular ring (12); The clamping ring (2) is in the shape of a circular ring, and the inner circumferential surface of the clamping ring (2) is provided with a clamping ring internal thread (21), and the clamping ring internal thread (21) of the clamping ring (2) is threadedly connected to the external thread (13) of the base connecting circular ring (12); The movable focusing wheel (3) is in the shape of a circular ring. The movable focusing wheel (3) is located on the periphery of the base connecting circular ring (12). The movable focusing wheel (3) and the base connecting circular ring (12) are arranged at intervals. The ball bearing (5) is embedded in the center hole of the movable focusing wheel (3). The ball bearing (5) and the center hole of the movable focusing wheel (3) are interference fit. The ball bearing (5) is sleeved on the periphery of the base connecting circular ring (12). The inner ring of the ball bearing (5) is clamped and limited between the clamping ring (2) and the base limit stop shoulder (14). The movable focus ring (4) is located on the upper end side of the movable focus wheel (3), and the movable focus ring (4) is connected to the upper end of the movable focus wheel (3); a focus ring light-transmitting through hole (41) is provided in the middle of the movable focus ring (4), which completely penetrates from top to bottom and is aligned with the base light-transmitting through hole (11) connected to the housing base (1), and the inner wall of the focus ring light-transmitting through hole (41) is provided with a focus ring internal thread (42); The lower end of the inner circumferential surface of the movable focusing wheel (3) is provided with a focusing wheel limit stop shoulder protruding inwardly, and the lower surface of the outer ring of the ball bearing (5) is in contact with the focusing wheel limit stop shoulder; The upper end portion of the movable focus wheel (3) is threadedly connected to the edge portion of the movable focus ring (4) via a locking screw (6).

2. The focusing module with improved structure according to claim 1, characterized in that: The base connection ring (12) and the housing connection base (1) are an integral structure.

3. The focusing module with improved structure according to claim 1, characterized in that: The outer wall of the movable focusing wheel (3) is provided with a groove (31).

Images