CN2539201Y

CN2539201Y - Automatic focusing mechanism for digital camera

Info

Publication number: CN2539201Y
Application number: CN 02234511
Authority: CN
Inventors: 黄维邦; 刘迪伦
Original assignee: Kinpo Electronics Inc
Current assignee: Kinpo Electronics Inc
Priority date: 2002-04-29
Filing date: 2002-04-29
Publication date: 2003-03-05
Anticipated expiration: 2012-04-29

Abstract

The utility model relates to an auto focusing apparatus of a digital camera, which is characterized in that an induction coil is arranged at the upper end of the store house packed by a photographic element, the upper end of which is combined with a magnetic element and the lower end of which is combined with an elastic element. When the auto focusing is carried out, the microprocessor, that is, the control induction coil will be connected with the appropriate current, which will produce a magnetic force mutually repulsed with the magnetic element and drive the magnetic element to move the photographic element and carry on the focusing operation. After the completion of focusing and the induction coil is stopped to be connected with the current, the elasticity of the elastic element will drive the photographic element to move and return to the original position.

Description

The autofocus mechanism of digital camera

Technical field

The utility model is the autofocus mechanism of relevant digital camera, especially utilizes inductive coil and magnetic element to drive photo-sensitive cell, focuses automatically.

Background technology

See also shown in Figure 1ly, existing digital camera comprises that camera lens 10, lens mount 20 and photo-sensitive cell package 30 form.This camera lens 10 is in conjunction with most eyeglasses (group) 11 and to focus lens 12; These photo-sensitive cell package 30 upper ends are in conjunction with glass 31, and the accommodation chamber 32 of glass 31 belows is in conjunction with a photo-sensitive cell 33.When focusing automatically, be to drive focus lens 12 shift positions by motor and gear train, the action of focusing, and photo-sensitive cell package 30 maintains static.

See also shown in Figure 2ly, the autofocus mechanism of another kind of existing digital camera is that unmatchful focus lens and eyeglass (group) 11 is motionless, moves the action of focusing by motor and gear train drive photo-sensitive cell package 30.

Above-mentioned two kinds of existing focusing modes, all must drive relevant eyeglass group or photo-sensitive cell package shift position by direct current or step motor, the action of focusing is all disposed complicated gear train and could be implemented, consequently camera lens costs an arm and a leg the raising that the cost of digital camera is relative.

For simplifying the autofocus mechanism of digital camera, after the creator studies again and again, finish the utility model eventually.

The utility model content

Fundamental purpose of the present utility model is to provide a kind of autofocus mechanism of digital camera, and it can simplify the autofocus mechanism of digital camera, to reduce manufacturing cost, promotes competitiveness of product.

The autofocus mechanism of a kind of digital camera of the utility model is characterized in that, an inductive coil is established in the accommodation chamber upper end that is included in the photo-sensitive cell package; In conjunction with a magnetic element, its lower end is in conjunction with a flexible member in the upper end of photo-sensitive cell; The other end of this flexible member is incorporated into the bottom of accommodation chamber.

Wherein the end of this magnetic element is resisted against guide groove, and there are protruding shelves the guide groove upper end.

Wherein this flexible member is a cup spring.

Description of drawings

Other purposes of the present utility model, effect and embodiment see also accompanying drawing and are described in detail as follows, wherein:

Fig. 1 is the existing digital camera mode synoptic diagram of focusing automatically.

Fig. 2 is the another kind of digital camera mode synoptic diagram of focusing automatically.

Fig. 3 is the utility model digital camera autofocus mechanism synoptic diagram.

Fig. 4 is a focusing action synoptic diagram of the present utility model.

Embodiment

See also shown in Figure 3ly, the utility model mainly is that the improvement motor that utilizes shown in Figure 2 drives the structure that complicated gear train moves whole photo-sensitive cell package 30; Be to establish inductive coil 43 in accommodation chamber 42 upper ends of photo-sensitive cell package 40; In conjunction with a magnetic element 45, the lower end is in conjunction with a flexible member 46 in the upper end of photo-sensitive cell 44; The end of this magnetic element 45 is resisted against guide groove 421, the position that guide groove 421 upper ends have protruding shelves 422 to move with restriction magnetic element 45; This flexible member 46 can be cup spring, and its lower end is incorporated into the bottom of accommodation chamber 42.

See also shown in Figure 4ly, the utility model places movably photo-sensitive cell 44 belows with flexible member 46, by the elastic force effect of flexible member 46, photo-sensitive cell 44 is remained on the initial position; This moment camera lens 50 focal length cooperate its initial position be adjusted to the focusing of infinite distant place clear after, camera lens 50 is fixing.When digital camera started focusing automatically, microprocessor was promptly controlled and is made suitable electric current by inductive coil 43, thereby the magnetic force that repels each other of generation and magnetic element 45, and promotion magnetic element 45 moves down the position as shown in the figure together with photo-sensitive cell 44.By the size of Control current, the amount of movement of sense of control optical element 44, the action of focusing automatically.This moment photo-sensitive cell 44 downward compression elastic elements 46.After focusing was finished, inductive coil 43 stopped energising, does not promptly have the effect of magnetic force, and magnetic element 45 promptly returns to original position together with the elastic force that photo-sensitive cell 44 is subjected to flexible member 46.

The utility model can make the optical facilities of camera lens 50 be reduced to 60 combine of the letter of mirror only and lens mount, and does not need the gear train and the motor of complexity, can significantly save manufacturing cost, but and the arrangement of the more convenient structure of reduced volume.

The above record only for utilizing the embodiment of the utility model technology contents, anyly is familiar with modification, the variation that this operator uses the utility model to do, and all belongs to the claim of the utility model opinion, and is not limited to the content that embodiment discloses.

In sum, autofocus mechanism of the present utility model is innovated to some extent, and has the effect enhancement really than existing camera autofocus mechanism, should close in patent condition, so apply for a patent in accordance with the law.

Claims

1. the autofocus mechanism of a digital camera is characterized in that, an inductive coil is established in the accommodation chamber upper end that is included in the photo-sensitive cell package; In conjunction with a magnetic element, its lower end is in conjunction with a flexible member in the upper end of photo-sensitive cell; The other end of this flexible member is incorporated into the bottom of accommodation chamber.

2. the autofocus mechanism of digital camera as claimed in claim 1 is characterized in that, wherein the end of this magnetic element is resisted against guide groove, and there are protruding shelves the guide groove upper end.

3. the autofocus mechanism of digital camera as claimed in claim 1 or 2 is characterized in that, wherein this flexible member is a cup spring.