CN201007772Y - Dynamic response time suppression structure for lens focusing drive - Google Patents

Abstract

The utility model discloses a dynamic response time restraining structure of lens focusing drive, which comprises a movable mechanism, a non-movable mechanism and at least one shock absorption component, wherein the movable mechanism at least comprises a base, a lens can be arranged in the center of the base, and a coil is wrapped around the base; the unmovable mechanism at least comprises a frame, a front cover and a bottom cover; a plurality of magnetic components are embedded around the frame, and the movable mechanism is accommodated in the center; the shock-absorbing component is connected between the movable mechanism and the non-movable mechanism and is used for absorbing the shake generated when the movable mechanism is focused and displaced to be positioned so as to inhibit the dynamic response time of the movable mechanism to a steady state.

Description

Dynamic Response Time Suppression Structure of Lens Focus Drive

technical field

The utility model relates to a structure for suppressing dynamic response time (Response Time) of lens focus drive, in particular to a structure capable of suppressing the response time of micro lens focus drive, reducing the jitter produced by lens focus movement, and quickly reaching a steady state structure.

Background technique

With the advancement of technology, the volume of digital cameras has shrunk quite small, and most of the current mobile phones have the functions of digital cameras. These are all due to the modularization and miniaturization of camera lenses, and there are many Various types of autofocus drive structure, the most commonly used one is the voice coil motor (VCM), because of its small size, low power consumption, precise actuation displacement and low price, it is suitable as a short-term driver for micro-lens autofocus. distance drive.

As shown in FIG. 1 , it is a three-dimensional exploded schematic view of the focus driving structure of a known lens, wherein the focus driving structure includes an upper cover 10, a lower bottom cover 11 and an outer frame 12, and four magnets 13 are respectively embedded in the outer periphery of the outer frame 12. A lens holder 14 is provided with threads, which can be screwed in to support a lens 15. A coil 16 is embedded in the periphery of the lens holder 14, and the lens holder 14 can move in the center of four magnets 13 in the outer frame 12, and is controlled by the The coil 16 is energized to generate a magnetic field polarity that repels or attracts the four magnets 13 to drive the lens holder 14 to perform focus displacement, and the lens holder 14 is supported at the center of the four magnets 13 by means of an upper and lower shrapnel 17 . When the coil 16 is energized, the coil 16 generates thrust with the magnet 13 due to the magnetic field of the current, and the lens support 14 is pushed from bottom to top by the shrapnel 17 until it is positioned.

However, as long as the lens has the function of auto focus, it will shake when the focus moves to the positioning stop, and then slowly reaches a steady state. The time required for this period of moving from stillness to stop is called dynamic response time ), as shown in Figure 2, which is a schematic diagram of a dynamic response waveform for detecting a known focusing drive structure. It can be seen from Figure 2 that it takes 1.34035 seconds to reach a steady state, which is quite a long time.

Since this dynamic response time will affect the length of time for the lens module to focus, it will have a great impact on the quality of the lens module, especially the length of time required for focusing. The longer the dynamic response time, the longer the required focusing time, so It is necessary to shorten the dynamic response time in order to effectively improve the time required for focusing, but there is currently no document or technology for improving the dynamic response time.

Contents of the invention

The purpose of this utility model is to provide a dynamic response time suppression structure of the lens focus drive, which can absorb the jitter generated when the lens focus drive structure moves to the position and stops moving, so as to suppress the dynamic response time (Response Time) and improve the quality. And achieve the purpose of saving power and improving performance.

In order to achieve the above object, the utility model provides a dynamic response time suppression structure for lens focusing drive, which includes a movable mechanism, a non-movable mechanism and at least one shock-absorbing component, wherein the movable mechanism at least includes a base, basically A lens can be installed in the center of the seat, and a coil is wrapped around the base; the immovable mechanism includes at least a frame, a front cover and a bottom cover; several magnetic components are embedded around the frame, and the movable mechanism is housed in the center The shock-absorbing component is connected between the movable mechanism and the non-movable mechanism, and is used to absorb the vibration generated when the movable mechanism is focused and displaced to a position, so as to suppress the dynamic response time of the movable mechanism to a steady state.

In order to achieve the above purpose, the utility model provides the above-mentioned dynamic response time suppression structure for lens focus drive, which also includes at least one elastic component, with a movable part and a non-movable part, the movable part is connected to the movable mechanism, the The non-movable part is connected to the non-movable mechanism, and the shock-absorbing component is connected between the movable part of the elastic component and the non-movable mechanism, so as to absorb the shaking generated when the movable mechanism focuses and moves to a position, so as to suppress the The dynamic response time of a movable mechanism to a steady state.

From the above, with the help of the implementation of the present utility model, it is indeed possible to absorb the movement and positioning of the lens focusing drive structure, and the jitter generated when the movement stops, thereby suppressing the dynamic response time (Response Time), improving the quality of the lens, and achieving power saving and improvement. purpose of efficacy.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

FIG. 1 is a three-dimensional exploded schematic diagram of a known lens focusing drive structure;

FIG. 2 is a schematic diagram of a dynamic response waveform for detecting a known focusing drive structure;

Fig. 3 is a three-dimensional exploded view of the focus driving structure of the lens of the present invention;

Fig. 4 is the perspective view of the bottom side after the combination of Fig. 3 (the lens is omitted) and a partially enlarged schematic diagram;

5A and 5B are schematic cross-sectional views of the working state of the lens focusing drive structure of the present invention using a shock-absorbing component; and

Fig. 6 is a schematic diagram of the dynamic response waveform after testing the shock-absorbing component of the utility model.

Among them, reference signs:

10 cover

11 Bottom cover

12 outer frame

13 four magnets

14 lens holder

15 lenses

16 Coils

17 Shrapnel

20 Focus drive structure

21 base

23 Magnetic Department

24 frame

25 front cover

26 Bottom cover

27 shell

28 Elastic components

30 coils

31 lens

50 movable mechanism

60 Non-movable mechanism

61 Accommodating notches

62 Shock-absorbing components

Detailed ways

The utility model is mainly aimed at suppressing the dynamic response time (Response Time) when the lens is focused, so a lens focus drive structure is used as an embodiment description, as shown in Figure 3, which is a three-dimensional exploded view of a lens focus drive structure, and Figure 4A is a diagram Figure 4B is a partially enlarged schematic diagram of Figure 4A, the lens focusing drive structure 20 includes a base 21, several magnetic parts 23, a frame 24, a front cover 25, and a bottom cover 26 , a housing 27 and several elastic components 28 . Wherein the base 21 has a coil 30 and a lens 31, the base 21 is arranged in the center of the frame 24, the lens 31 is installed in the center of the base 21, the coil 30 is wrapped around the base 21, the The magnetic part 23 is disposed on the periphery of the frame 24 so that it is located just outside the coil 30 and maintains a fixed distance for the effect of the electric field.

Wherein the elastic component 28 is a conductive material, which is arranged between the frame 24 and the bottom cover 26, and between the frame 24 and the front cover 25, and the casing 27 covers all the above-mentioned components, but the lens 31 can be changed according to the situation exposed.

Referring to Fig. 4A and Fig. 4B, in the present utility model, the base 21 belongs to the movable mechanism 50, while the rest of the components belong to the immovable mechanism 60. The utility model provides at least one Accommodating the notch 61, and at least one shock-absorbing component 62 is built into the accommodating notch 61, and the shock-absorbing component 62 is connected between the movable mechanism 50 and the non-movable mechanism 60 to absorb the displacement of the movable mechanism 50 The jitter generated during positioning to suppress the dynamic response time.

As shown in the embodiment of Fig. 4A and Fig. 4B and Fig. 5A and Fig. 5B, it is a schematic cross-sectional view of the working state of the lens focusing drive structure of the present invention using a shock-absorbing component. One end of the shock-absorbing component 62 is attached to the bottom cover 26, and the other end is Attached to the lower side of the base 21 , the shock-absorbing component 62 can be a shock-absorbing material or component such as soft gel, soft spring or soft rubber. In addition, the utility model can also connect the shock-absorbing assembly 62 between the front cover 25 and the base 21, or between the frame 24 and the base 21, as long as the entrance of the lens 31 is avoided, the front cover 25 , The shock-absorbing component 62 is arranged between the bottom cover 26 and the frame 24 and the base 21 .

In addition, since the elastic component 28 is provided with the movable part connection base 21, and the non-movable part is connected to the front cover 25 or the bottom cover 26, the utility model can also connect the shock-absorbing component 62 to the elastic component 28 and the front cover. Between the non-movable mechanism 60 of the cover 25 or the bottom cover 26, the vibration generated when the base 21 is displaced to the position can be absorbed by the shock-absorbing component 62, so as to suppress the dynamic response time.

As shown in FIG. 6 , it is a schematic diagram of a dynamic response waveform for detecting the shock-absorbing component of the utility model. It can be seen from the figure that after the shock-absorbing assembly 62 is added to the utility model, the base 21 directly reaches a steady state when it is displaced to the position, and there is no dynamic response time at all, so that the dynamic response time can be suppressed quite effectively, and the utility model adds shock-absorbing After the component 62, it also has a shock-absorbing and buffering effect on the impact and vibration tests in the product reliability test, making the product more reliable.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (5)

1. a camera lens focusing Driven Dynamic response time is suppressed structure, it is characterized in that, comprising:

One movable agency comprises a pedestal at least, and a camera lens can be installed in the pedestal center, coats a coil around the pedestal;

One movable agency not comprises at least, and a framework is embedded several magnet assemblies all around, ccontaining this movable agency in center; One protecgulum; One bottom;

At least one in order to absorb the shake that is produced when the focusing of this movable agency is moved to the location, to suppress the shock-absorbing assembly of this movable agency, be connected in this movable agency and this is not between the movable agency to the dynamic response time of stable state.

2. dynamic response time according to claim 1 suppresses structure, it is characterized in that, at this movable agency and also do not offer a ccontaining notch in order to ccontaining this shock-absorbing assembly between the movable agency.

3. dynamic response time according to claim 2 suppresses structure, it is characterized in that this ccontaining notch can be arranged on protecgulum or the bottom.

4. dynamic response time according to claim 1 suppresses structure, it is characterized in that this shock-absorbing assembly can be soft gel, soft spring or soft rubbermeter.

5. dynamic response time according to claim 1 suppresses structure, it is characterized in that, also comprises:

At least one elastic parts is provided with movable part and not movable portion, and this movable part connects this movable agency, and this not movable portion connects this not movable agency, and this shock-absorbing assembly is connected in the movable part of this elastic parts and this is not between the movable agency.

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