CN100487819C - Optical height adjusting device - Google Patents

Abstract

The invention relates to an optical height adjusting device, which comprises a base, wherein the lower end of the base can be fixed on any plane; a rod-shaped member which is arranged in the base and can move up and down freely in the axial direction, and the upper end of the rod-shaped member can be provided with an optical component; a screw mechanism fixed in the base, the upper end of the screw mechanism is a screw cylinder which can move up and down axially and is in point contact with the bottom of the rod-shaped member; a compression spring; when the screw mechanism is rotated to make the rod-like member produce micro movement, the compression spring is compressed between a retaining ring arranged at the bottom of the rod-like member and a protruding part in the base to produce a return force, so that the rod-like member and the screw mechanism are kept in contact without clearance, and the precision of the height adjusting device is kept.

Description

Optical Height Adjustment Device

technical field

The invention relates to a height adjustment device, in particular to an optical height adjustment device. The optical height adjustment device disclosed by the invention is suitable for performing optical experiments or being applied to optical instruments. This height adjustment device can also be used in other fields, such as measuring side, machining, product assembly and so on. If it is combined with a motor and an electric control mechanism, it becomes an electric fine-adjustment height device, which is also quite suitable for the automation industry.

Background technique

When conducting optical experiments, it is necessary to use fixtures to hold optical components for alignment or other purposes. When performing alignment, it is necessary to use a height-adjusting device for accurate positioning and alignment.

Ordinary optical parts, such as lenses, are usually clamped by the mirror holder, and fixed on the optical table by the support rod and the support seat. The support rod can be fixed after adjusting the required height in the support seat, but it can only be adjusted roughly. , if it is necessary to adjust the height accurately, it must be equipped with a height mobile platform, which is generally called a Z-axis translation stage (Z stage).

In the existing height adjustment device, as shown in FIG. 1 , 101 is a support rod, 102 is a support seat, 103 is a knob, and 104 is a mobile platform. Optical components, such as lenses, are installed on the support rod 101. The support rod 101 is located on the support base 102, and the support rod 101 is moved up and down by manual stretching to perform alignment. After alignment, the rotation knob 103 is used to fix the support Rod 101, but this device can only be adjusted roughly, and it must be matched with a high-precision mobile platform 104 to meet the optical requirements for high precision. However, this high-precision mobile platform 104 is complex in structure, expensive, takes up space, and requires It is also time-consuming, and the support rod 101 is easy to get loose, resulting in reduced work efficiency.

Contents of the invention

The purpose of the present invention is to design a height adjustment device for optics. Considering the space and installation problems in advance, the device that combines the support rod, the support seat and the mobile platform is not only space-saving, simple in structure, easy to manufacture and assemble, and low in cost. Also cheap.

The optical height adjustment device disclosed by the present invention mainly includes a base, the lower end of which can be fixed on any plane, a rod-shaped member placed in the above-mentioned base, which can move freely up and down in the axial direction, and a screw mechanism fixed In the base, one end of the screw mechanism is a helical cylinder, which can move up and down in the axial direction, and is in point contact with the bottom of the above-mentioned rod-shaped member. A compression spring is arranged on the bottom of the rod-shaped member. When the screw mechanism is rotated to make the rod-shaped member move slightly, the compression spring is compressed between the buckle provided at the bottom of the rod-shaped member and the protruding part inside the base to generate a push-back force to make the rod-shaped The contact between the member and the screw mechanism is maintained without gaps to ensure precision.

The optical assembly can be fixed on the upper end of the rod-shaped member, and the bottom end of the rod-shaped member is in point contact with the tip of the helical cylinder of the screw mechanism. Rotating the helical mechanism can make the helical cylinder move up and down. The body does not move, because the compression spring is installed at the bottom of the rod-shaped member, the spring body surrounds the rod-shaped member, extends axially along the rod-shaped member, and the other end contacts a protrusion on the inner surface of the base, Therefore, when the helical cylinder moves upward, the rod-shaped member is pushed to move upward in the axial direction, compressing the space where the compression spring is located, so that the spring generates a reverse thrust, so that the rod-shaped member and the helical cylinder can be maintained contact to maintain the precision of this height adjustment device.

The rod-shaped member can be directly sleeved on the inner surface of the base, or use a bushing to be placed in the base, the outer surface of the bush is in contact with the inner surface of the base, and the rod-shaped member Then it is sleeved in the bushing, and a positioning fastener is installed on the top of the base to fix the bushing in the base, and the positioning fastener can prevent the rod-shaped member from rotating.

In order to prevent the rod-shaped member from rotating left and right, a fixed knob can also be installed on the base, and a planar groove can be cut out in the axial direction on the surface of the rod-shaped member, so as to adjust the plane cut between the fixed knob and the rod-shaped member. The depth of engagement between the grooves prevents the rod member from rotating and sliding in the axial direction.

The screw mechanism can be directly fixed on the base, or use a collar and a bolt, the collar is placed in the base, the inner wall of the collar is threadedly engaged with the neck of the screw mechanism, and the bolt The ring is fixed on the base, and the screw mechanism is fixed on the base.

There is an extension member under the base, which can be adjusted to the desired height and fixed. The extension member can be easily fixed on the optical table.

The height adjustment device of the present invention can independently perform height adjustment without affecting other degrees of freedom, and has functions of rough adjustment and fine adjustment at the same time.

This device combines the support rod, support seat and high-precision mobile platform in the existing optical height adjustment device. It has the advantages of fewer components, simple structure, no space occupation, low manufacturing (assembly) cost, easy installation, and easy operation. Convenient, good adjustment accuracy, not easy to loosen, large load, independent and stable adjustment without affecting other degrees of freedom. Therefore, the main purpose of the present invention is to save costs and provide more convenient operation to improve work efficiency.

In order to make the above-mentioned purpose, features and advantages more comprehensible, preferred embodiments will be described in detail below with accompanying drawings.

Description of drawings

Fig. 1 is the perspective view of existing optical height adjustment device;

Fig. 2 is the front view of an embodiment of the present invention;

Fig. 3 is a sectional view of an embodiment of the present invention;

Fig. 4 is the front view of another embodiment of the present invention;

Fig. 5 is a cross-sectional view of another embodiment of the present invention.

Description of figure number:

101--support rod; 102--support seat; 103--knob; 104--high precision adjustment platform;

201--bush; 202--location fastener; 203--buckle; 204--base;

2041--inner protrusion of the base; 205--bolt; 206--screw mechanism; 2061--spiral cylinder;

2062--neck; 2063--screw head; 207--rod member; 208--ring sleeve;

209--fixed knob; 210--compression spring; 211--bolt; 212--base; 301--bush;

302--positioning fastener; 303--buckle; 304--base; 3041--inner protrusion of the base;

305--bolt; 306--screw mechanism; 3061--spiral cylinder; 3062--neck;

3063--screw head; 307--rod member; 310--compression spring; 311--bolt;

313--base; 314--fixed knob.

Detailed ways

A preferred embodiment of the present invention will now be described with reference to the accompanying drawings.

As shown in Figures 2 and 3, it is a preferred embodiment of the present invention, wherein a rod-shaped member 207 is installed in a base 204, and a buckle 203 is fixed at the bottom of the rod-shaped member 207 to fix a compression spring 210 At the bottom of the rod-shaped member 207, the spring body of the compression spring 210 surrounds the rod-shaped member 207 and extends axially. 210 is compressed between the buckle 203 and the protruding portion 2041 .

A screw mechanism 206 is located in the base 204, the screw mechanism 206 has a helical cylinder 2061, a neck 2062 and a rotating head 2063, rotating the rotating head 2063 of the screw mechanism 206 can make the helical cylinder 2061 move axially, The top of the helical cylinder 2061 is in contact with the bottom end of the rod-shaped member 207, so when the helical cylinder 2061 moves up and down in the axial direction, the rod-shaped member 207 also moves up and down; when the rod-shaped member 207 moves upward, Can compress this compression spring 210, because the difference between the maximum length (free length, free length) and the minimum length (real length) of this compression spring, that is, the stretchability of this compression spring 210, is greater than the adjustment distance of this screw mechanism 206, so The compression spring 210 exerts a reverse thrust on the rod-shaped member 207, so that the rod-shaped member 207 keeps in contact with the helical cylinder 2061 without gap, so that the accuracy of the height adjustment device can be maintained.

A bushing 201 is placed in the base 204, the outer surface of the bushing 201 is in contact with the inner surface of the base 204, and the rod-shaped member 207 is sleeved in the bushing 201, the base The top end device is a positioning fastener 202, the positioning fastener 202 is fixed by the bolt 205, and then the bushing 201 is fixed in the base 204, and the positioning fastener 202 can prevent the rod-shaped member 207 from rotating. The bushing 201 allows the rod-shaped member 207 to freely move up and down in the base 204 in the axial direction without shifting forward, backward, left, and right, and reduces friction so that the rod-shaped member 207 can move axially more easily.

There are many design methods for preventing the rod-shaped member 207 from sliding axially. As mentioned above, installing a positioning fastener 202 on the top of the base is only one of them. Other methods can also be used on the rod-shaped member 207. Cut out a planar slot on the surface of the base 204 in the axial direction, and install a fixed knob 209 on the base 204. Adjust the engagement depth between the fixed knob 209 and the planar slot of the rod-shaped member 207 to prevent the rod-shaped member from 207 slides axially.

The screw mechanism 206 can be directly fixed on the base 204 , or fixed by a collar 208 and a bolt 211 . The collar 208 is installed in the base 204, the inner wall of the collar 208 is threadedly engaged with the neck 2062 of the screw mechanism 206, and the bolt 211 is used to fix the collar 208 on the base 204, and then The screw mechanism 206 is fixed on the base 204 .

The helical cylinder 2061 of the screw mechanism 206 is a straight forward type and cannot rotate. The upper end of the helical cylinder 2061 is hemispherical and has been hardened, so it is in point contact with the rod-shaped member 207, which can reduce friction therebetween and prevent The helical cylinder 2061 drives the rod-shaped member 207; generally speaking, the precision of the helical mechanism 206 is 0.01 mm, and the stroke can reach more than 25 mm.

The material of the base 204 can be manufactured by injection molding, which is suitable for mass production, and the material of the rod-shaped member 207 can be stainless steel.

As shown in Figures 4 and 5, it is another preferred embodiment of the present invention. This embodiment is similar to the embodiment of Figures 2 and 3. The rod-shaped member 307 is installed in the base 304 and can move freely in the axial direction. The upper end of the rod-shaped member 307 can be equipped with optical components, and the compression spring 310 is installed on the bottom end of the rod-shaped member 307 by means of a buckle 303. The screw mechanism 306 includes a spiral cylinder 3061, a neck 3062, and a screw head 3063. The neck 3062 is fixed in the base 304, the upper end of the helical cylinder 3061 is in contact with the lower end of the rod-shaped member 307, when the helical head 3063 is rotated, the helical cylinder 3061 will move axially up and down, while the neck 3062 remains unrotated. When the spiral cylinder 3061 moves up and down, the rod-shaped member 307 also moves up and down, so that the height of the optical assembly can be adjusted. The structure and function of a bushing 301 , a positioning fastener 302 and a bolt 305 are the same as 201 , 202 and 205 in FIG. 3 .

In this embodiment, an extension mechanism is designed under the base 304, and the extension mechanism includes a base 313 and a fixing knob 314. After the height of the base 304 is adjusted, the fixing knob 314 is rotated to fix the relative position of the base 304 and the base 313, so as to achieve the purpose of coarse adjustment.

Claims (12)

1. An optical height adjustment device, characterized in that, comprising: A base, the lower end of which can be fixed on any plane; A rod-shaped member, placed in the above-mentioned base, can move freely up and down in the axial direction; A screw mechanism fixed in the base, the screw mechanism includes a helical cylinder, which can move up and down in the axial direction, and is in point contact with the bottom of the above-mentioned rod-shaped member; A compression spring is arranged on the bottom of the rod-shaped member; When the screw mechanism is rotated to make the rod-shaped member move slightly, the compression spring is compressed between the buckle provided at the bottom of the rod-shaped member and the protruding part inside the base to generate a push-back force to make the rod-shaped The contact between the member and the screw mechanism is maintained without gaps to ensure precision. 2. The height adjustment device for optics according to claim 1, further comprising a bushing installed in the base and sleeved on the rod-shaped member, the bush makes the rod-shaped member It can move freely up and down in the axial direction in the base without shifting back and forth, left and right, and reduces friction, so that the rod-shaped member is easier to move in the axial direction. 3. The height adjustment device for optics as claimed in claim 2, further comprising a positioning fastener, which is installed on the top of the base for fixing the above-mentioned bushing and preventing the The rod member rotates. 4. The optical height adjusting device according to claim 3, wherein the rod-shaped member has a side surface, and the side surface is in contact with the positioning fastener to prevent the rod-shaped member from rotating. 5. The optical height adjustment device according to claim 1, further comprising a collar and a bolt, the inner wall of the collar has threads and is placed in the base, and is sleeved on the screw mechanism , the bolt fixes the collar on the base; the screw mechanism is fixed in the base by the fixing action of the collar and the bolt. 6. The height adjusting device for optics according to claim 1, further comprising a fixing knob for fixing the rod-shaped member, the surface of the rod-shaped member has a planar cut along the axial direction. When fixing the rod-shaped member, rotate the fixing knob so that the end of the fixing knob is closely attached to the planar groove of the rod-shaped member, so as to prevent the rod-shaped member from moving in the axial direction. 7. An optical height adjustment device, characterized in that it comprises: a base; An extension mechanism, including a base and a fixed knob; A rod-shaped member, placed in the above-mentioned base, can move freely up and down in the axial direction; A screw mechanism fixed in the base, the screw mechanism includes a helical cylinder, which can move up and down in the axial direction, and is in point contact with the bottom of the above-mentioned rod-shaped member; A compression spring is arranged on the bottom of the rod-shaped member; When the screw mechanism is rotated to make the rod-shaped member move slightly, the compression spring is compressed between the buckle provided at the bottom of the rod-shaped member and the protruding part inside the base to generate a push-back force to make the rod-shaped There is no gap between the component and the screw mechanism to maintain precision; the extension mechanism is located at the bottom of the base, and its base can be fixed on any plane, and the base can move up and down axially to change the base The position relative to the base is used to roughly adjust the height. After the adjustment is completed, rotate the fixing knob to fix the base. 8. The height adjustment device for optics according to claim 7, further comprising a bushing installed in the base and sleeved on the rod-shaped member, the bush holds the rod-shaped member It can move freely up and down in the axial direction in the base without shifting back and forth, left and right, and reduces friction, so that the rod-shaped member is easier to move in the axial direction. 9. The height adjusting device for optics as claimed in claim 8, further comprising a positioning fastener installed on the top of the base for fixing the above-mentioned bushing and preventing the The rod member rotates. 10. The optical height adjustment device according to claim 7, further comprising a bolt, rotating the bolt so that the end of the bolt is closely attached to the screw mechanism so that it cannot rotate, and the screw mechanism fixed on the base. 11. The height adjusting device for optics as claimed in claim 9, wherein the rod-shaped member has a side surface, and the side surface is in contact with the positioning fastener to prevent the rod-shaped member from rotating. 12. The optical height adjustment device according to claim 7, further comprising a fixing knob for fixing the rod-shaped member, the surface of the rod-shaped member has a plane cut out in the axial direction When fixing the rod-shaped member, rotate the fixing knob so that the end of the fixing knob is closely attached to the planar groove of the rod-shaped member, so as to prevent the rod-shaped member from moving in the axial direction.

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