CN211826708U

CN211826708U - Microscope focusing device

Info

Publication number: CN211826708U
Application number: CN202020754202.6U
Authority: CN
Inventors: 冯学云; 杨崇贵
Original assignee: Guilin Microtech Optical Instrument Co ltd
Current assignee: Guilin Microtech Optical Instrument Co ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-10-30
Anticipated expiration: 2030-05-09

Abstract

The utility model discloses a microscope focusing device, which relates to the technical field of microscopes, wherein one end of a host bracket, which deviates from the installation of a microscope host, is connected with a focusing seat in a sliding way, and the sliding directions of the focusing seat and the host bracket are parallel to the adjustment direction of the working distance of the microscope host; a gear and a rack which are meshed with each other are arranged between the focusing seat and the host bracket, the gear is fixed on a gear shaft, and the outer end of the gear shaft is connected with a focusing hand wheel; the back of focusing seat is fixed with the connecting block, and the connecting block is articulated mutually with fixed quarter butt through the pivot, and the locking Assembly who is used for locking fixed quarter butt is installed to the connecting block. The utility model provides a current microscope can't be applied to the problem of the limited, inconvenient erection bracing post's in space occasion.

Description

Microscope focusing device

Technical Field

The utility model belongs to the technical field of microscope technique and specifically relates to a microscope focusing device.

Background

When the image observed by using the microscope to observe the sample is fuzzy, the microscope needs to be focused, namely, the distance between the objective lens and the sample is adjusted to obtain clear imaging. The current microscope focusing method includes a mobile microscope main unit and a mobile object stage, and for a stereoscopic microscope used for observing objects with large area and wide distribution or other conditions that the objects are inconvenient to move and observe, the focusing method generally adopts the mode of moving the microscope main unit. The existing focusing device of the stereoscopic microscope comprises a host bracket, a locking hand wheel and a support column, wherein a microscope host is installed at one end of the host bracket, the other end of the host bracket is sleeved on the support column, the support column is fixedly erected on a base, the host bracket can slide up and down along the support column to be focused, and after the host bracket is adjusted, the locking hand wheel is twisted to lock and fix the host bracket on the support column at a required height position. The microscope relying on the supporting column to realize focusing cannot be applied to a machine platform with limited space and inconvenient installation of a base and the supporting column.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a microscope focusing device, the problem of the unable occasion of being applied to space limited, inconvenient erection bracing post of current microscope can be solved to this kind of device.

In order to solve the above problem, the utility model discloses a technical scheme is: the microscope focusing device comprises a host bracket, wherein one end of the host bracket, which is far away from a microscope host, is connected with a focusing seat in a sliding manner, and the sliding directions of the focusing seat and the host bracket are parallel to the adjustment direction of the working distance of the microscope host; a gear and a rack which are meshed with each other are arranged between the focusing seat and the host bracket, the gear is fixed on a gear shaft, and the outer end of the gear shaft is connected with a focusing hand wheel; the back of focusing seat is fixed with the connecting block, the connecting block is articulated mutually through pivot and fixed quarter butt, the connecting block is installed and is used for locking the locking Assembly of fixed quarter butt.

In the technical solution of the microscope focusing device, a more specific technical solution may also be: the fixed short rod is fixedly connected with the rotating shaft, the connecting block is provided with an adjusting hole intersected with the rotating shaft, the locking assembly comprises a fixed clamping block, a movable clamping block and a locking screw rod, the fixed clamping block, the movable clamping block and the locking screw rod are installed in the adjusting hole, the rotating shaft is located between the fixed clamping block and the movable clamping block, and the fixed clamping block and the movable clamping block are connected through the locking screw rod.

Furthermore, the axial direction of the adjusting hole is perpendicular to the axial direction of the rotating shaft, and the contact surfaces of the fixed clamping block and the movable clamping block with the rotating shaft are inclined surfaces which are oppositely arranged.

Further, the rack pass through the forked tail installation piece with host computer bracket connection, the forked tail installation piece is followed the length direction of rack sets up, the focusing seat is equipped with the forked tail spout, the forked tail installation piece with forked tail spout sliding fit.

Further, the rack is a helical rack, and the gear is a helical gear.

Furthermore, a wheel axle sleeve fixedly connected with the focusing seat is sleeved on the gear axle, and two ends of the wheel axle sleeve extend out of the focusing seat and are respectively abutted against the focusing hand wheels at two ends of the gear axle; the wheel shaft is sleeved with a threaded connection section and a conical section which are positioned between the focusing hand wheel and the focusing seat, the conical section is reduced from the threaded connection section to the tail end of the wheel shaft sleeve, and the conical section is provided with at least two openings along the direction of the axis of the wheel shaft sleeve; the conical section is sleeved with an adjusting nut connected with the threaded connecting section, the adjusting nut is provided with a conical hole coaxially arranged with the conical section, the length of the conical hole is smaller than that of the conical section, and the inner diameter of a small-diameter port of the conical hole is matched with the outer diameter of a small-diameter end of the conical section; the wheel axle sleeve is provided with a position avoiding notch corresponding to the meshing position of the gear and the rack.

Furthermore, the gear shaft and the wheel shaft sleeve are eccentrically arranged.

Since the technical scheme is used, compared with the prior art, the utility model following beneficial effect has:

1. host computer bracket sliding connection focusing seat, the working distance that can adjust the microscope host computer through rack and pinion mechanism between host computer bracket and the focusing seat, the focusing seat back articulates there is fixed quarter butt, can be with the direct cartridge of fixed quarter butt on the machine platform of being in, and observe the host computer bracket locking at required angular position by locking Assembly, traditional microscopical base and support column have been got rid of, the holistic occupation space of microscope has been reduced, and be applicable to the occasion that the space is limited, inconvenient erection bracing post.

2. The rotating shaft locking structure is simple, convenient to install and reliable in locking.

3. The dovetail mounting block and the dovetail groove are arranged, so that the reliability of connection between the host bracket and the focusing seat is improved, the sliding is smooth, and the processing and the mounting are facilitated.

4. The arrangement of the axle sleeve and the adjusting nut can adjust the rotating tightness of the focusing hand wheel.

5. The axle sleeve is an eccentric sleeve, which is beneficial to adjusting the meshing clearance between the gear shaft and the rack.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the focusing apparatus for a microscope.

Fig. 2 is a front view of the present microscope focusing apparatus.

Fig. 3 is a schematic view of the internal structure of the focusing device for a microscope.

Fig. 4 is a schematic view of the mounting position of the adjustment nut.

Fig. 5 is a sectional view taken in the direction of a-a in fig. 4.

Fig. 6 is a schematic structural view of the hub.

Fig. 7 is a left side view of fig. 6.

Reference numerals in the drawings indicate: 1. fixing the short rod; 1-1, clamping arms; 2. a rotating shaft; 3. a focusing hand wheel; 4. a focusing seat; 4-1, connecting blocks; 4-11, adjusting holes; 4-12, dovetail chutes; 5. a host bracket; 5-1, a support ring; 6. locking the screw; 7. a dovetail mounting block; 8. a helical rack; 9. locking the screw rod; 10. a movable clamping block; 11. fixing the clamping block; 12. a helical gear; 13. a hub sleeve; 13-1, a conical section; 13-11, opening; 13-2, a threaded connection section; 13-3, avoiding gaps; 14. adjusting the nut; 15. a gear shaft.

Detailed Description

The invention will be described in more detail with reference to the following embodiments:

the microscope focusing device shown in fig. 1 to 4 mainly comprises a fixed short rod 1, a focusing hand wheel 3, a focusing seat 4, a host bracket 5, a gear rack mechanism, a wheel axle sleeve 13, an adjusting nut 14 and a locking assembly, wherein one end of the host bracket 5 is provided with a support ring 5-1 for mounting a microscope host, the support ring 5-1 is connected with a locking screw 6 for locking the microscope host, the other end of the host bracket 5 is slidably connected with the focusing seat 4, and the sliding directions of the focusing seat 4 and the host bracket 5 are parallel to the adjustment direction of the working distance of the microscope host. The gear rack mechanism is a helical rack 8 and a helical gear 12 which are arranged between the focusing seat 4 and the host bracket 5 and are meshed with each other; in order to conveniently install the helical rack 8 and ensure the connection reliability between the host bracket 5 and the focusing seat 4, a dovetail mounting block 7 is fixedly installed on the host bracket 5 by a screw, the helical rack 8 is connected with the host bracket 5 through the dovetail mounting block 7, the dovetail mounting block 7 is arranged along the length direction of the helical rack 8, the length direction of the helical rack 8 is parallel to the adjustment direction of the working distance of the microscope host, and the helical rack 8 is fixedly installed in a positioning groove of the dovetail mounting block 7 through the screw; screws at the upper end and the lower end of the helical rack 8 form a limiting structure for the helical gear 12, so that the helical gear 12 is prevented from slipping from the two ends of the helical rack 8; the focusing seat 4 is provided with dovetail chutes 4-12 in sliding fit with the dovetail mounting block 7, and a certain distance is reserved between the bottoms of the dovetail chutes 4-12 and the opposite surface of the dovetail mounting block 7 so as to guarantee the meshing requirements of the helical gear 12 and the helical rack 8. The bevel gear 12 is fixed on a gear shaft 15, and two ends of the gear shaft 15 penetrate through the focusing seat 4 and are respectively connected with the two focusing handwheels 3. The back of the focusing seat 4 is fixedly provided with a connecting block 4-1, the connecting block 4-1 is hinged with a short fixed rod 1 through a transversely arranged rotating shaft 2, the connecting end of the short fixed rod 1 and the connecting block 4-1 is provided with two clamping arms 1-1, and the connecting block 4-1 is arranged between the two clamping arms 1-1; the fixed short rod 1 is tightly matched with the rotating shaft 2 and is fixedly connected through a screw, and the fixed short rod 1 and the rotating shaft 2 do not move relatively, so that the focusing seat 4 can freely rotate in a certain range around the rotating shaft 2. The connecting block 4-1 is provided with an adjusting hole 4-11 intersected with the rotating shaft 2, the axial direction of the adjusting hole 4-11 is vertical to the axial direction of the rotating shaft 2, and a locking assembly used for locking the rotating shaft 2 is arranged in the adjusting hole 4-11. The locking assembly of the embodiment comprises a fixed clamping block 11, a movable clamping block 10 and a locking screw rod 9 which are arranged in adjusting holes 4-11, wherein the fixed clamping block 11 and the movable clamping block 10 are arranged at an interval from top to bottom, one part of a rotating shaft 2 extends into the adjusting holes 4-11 and is arranged between the fixed clamping block 11 and the movable clamping block 10, the contact surfaces of the fixed clamping block 11 and the movable clamping block 10 and the rotating shaft 2 are inclined surfaces which are arranged oppositely, and the fixed clamping block 11 and the movable clamping block 10 are connected through the locking screw rod 9 in a threaded mode to clamp or loosen the rotating shaft 2.

As shown in fig. 4 and 5, in order to adjust the tightness of the rotation of the focusing handwheel 3, a sleeve 13 is sleeved on the gear shaft 15, the sleeve 13 is fixedly connected in the focusing seat 4, two ends of the sleeve 13 extend out of the focusing seat 4 and respectively abut against the focusing handwheel 3 at two ends of the gear shaft 15, and one end of the sleeve 13 is connected with an adjusting nut 14 through a thread. As shown in fig. 6 and 7, the axle sleeve 13 is an eccentric sleeve, one end of the sleeve body is provided with a conical section 13-1 and a threaded connection section 13-2, the conical section 13-1 is reduced from the threaded connection section 13-2 to the tail end of the axle sleeve 13, and the conical section 13-1 is uniformly provided with four openings 13-11 along the axial direction of the axle sleeve 13, so that the conical section 13-1 is divided into four lobes; a position avoiding gap 13-3 is also arranged at the position of the middle part of the wheel axle sleeve 13, which is close to the meshing position of the helical gear 12 and the helical rack 8. The conical section 13-1 and the threaded connection section 13-2 of the wheel axle sleeve 13 are positioned between the focusing seat 4 and one of the focusing hand wheels 3, and the conical section 13-1 is sleeved with an adjusting nut 14 connected with the threaded connection section 13-2; the adjusting nut 14 is provided with a taper hole which is coaxial with the taper section 13-1, the length of the taper hole is smaller than that of the taper section 13-1, the inner diameter of the small-diameter hole of the taper hole is matched with the outer diameter of the small-diameter end of the taper section, and the axial length of the adjusting nut 14 is smaller than the distance between the adjusting hand wheel 3 and the focusing seat 4 so as to obtain a sufficient adjusting distance.

The microscope adjusting device can be used for observing on the machine platform by only providing the machine platform with the mounting hole with the same outer diameter as the fixed short rod 1, inserting the fixed short rod 1 into the machine platform for fixation, and mounting and fixing the microscope host on the support ring 5-1 of the host bracket 5. During the use, locking screw 9 is unscrewed, focusing seat 4 can rotate relative to pivot 2, after the host computer bracket 5 that links into an organic whole with focusing seat 4 drives the microscope host computer and rotates suitable angle, screw in locking screw 9, activity clamp splice 10 receives locking screw 9's pulling force, slowly be close to fixed clamp splice 11, in this process, fixed clamp splice 11 and activity clamp splice 10 are increasingly big to the power of hugging closely of pivot 2, when locking screw 9 is turned round, fixed clamp splice 11 and activity clamp splice 10's the power of hugging closely this moment can make focusing seat 4 and pivot 2 no longer rotate relatively, thereby fix the microscope host computer at required angular position. When focusing is carried out, the focusing hand wheel 3 is rotated, the gear shaft 15 is driven by the focusing hand wheel 3 to rotate in the wheel shaft sleeve 13, the helical gear 12 on the gear shaft 15 drives the helical rack 8 to move up and down, then the host bracket 5 and the microscope host are driven to move up and down, and the proper working distance is adjusted. When the rotation tightness of two focusing hand wheels 3 connected to a gear shaft 15 needs to be adjusted, an adjusting nut 14 on a wheel shaft sleeve 13 is screwed in towards the direction of a focusing seat 4, a small-diameter opening of a conical hole of the adjusting nut 14 moves along the direction of a large-diameter end of a conical section 13-1, an opening 13-11 of the conical section 13-1 is slowly folded, and the gear shaft 15 in the wheel shaft sleeve 13 is slowly clamped, so that the rotation tightness is increased; the adjustment nut 14 is rotated in the reverse direction, so that the tightness of rotation of the focusing handwheel 3 can be reduced.

Claims

1. The utility model provides a microscope focusing device, includes the host computer bracket, its characterized in that: one end of the host bracket, which is far away from the microscope host, is connected with a focusing seat in a sliding manner, and the sliding directions of the focusing seat and the host bracket are parallel to the adjustment direction of the working distance of the microscope host; a gear and a rack which are meshed with each other are arranged between the focusing seat and the host bracket, the gear is fixed on a gear shaft, and the outer end of the gear shaft is connected with a focusing hand wheel; the back of focusing seat is fixed with the connecting block, the connecting block is articulated mutually through pivot and fixed quarter butt, the connecting block is installed and is used for locking the locking Assembly of fixed quarter butt.

2. A microscope focusing apparatus according to claim 1, wherein: the fixed short rod is fixedly connected with the rotating shaft, the connecting block is provided with an adjusting hole intersected with the rotating shaft, the locking assembly comprises a fixed clamping block, a movable clamping block and a locking screw rod, the fixed clamping block, the movable clamping block and the locking screw rod are installed in the adjusting hole, the rotating shaft is located between the fixed clamping block and the movable clamping block, and the fixed clamping block and the movable clamping block are connected through the locking screw rod.

3. A microscope focusing apparatus according to claim 2, wherein: the axial of the adjusting hole is perpendicular to the axial of the rotating shaft, and the contact surfaces of the fixed clamping block and the movable clamping block and the rotating shaft are inclined planes which are oppositely arranged.

4. A microscope focusing apparatus according to claim 3, wherein: the rack pass through the forked tail installation piece with host computer bracket connection, the forked tail installation piece is followed the length direction of rack sets up, the focusing seat is equipped with the forked tail spout, the forked tail installation piece with forked tail spout sliding fit.

5. A microscope focusing apparatus according to claim 4, wherein: the rack is a helical rack, and the gear is a helical gear.

6. A microscope focusing apparatus according to any one of claims 1 to 5 wherein: a wheel axle sleeve fixedly connected with the focusing seat is sleeved on the gear shaft, and two ends of the wheel axle sleeve extend out of the focusing seat and are respectively abutted against the focusing hand wheels at two ends of the gear shaft; the wheel shaft is sleeved with a threaded connection section and a conical section which are positioned between the focusing hand wheel and the focusing seat, the conical section is reduced from the threaded connection section to the tail end of the wheel shaft sleeve, and the conical section is provided with at least two openings along the direction of the axis of the wheel shaft sleeve; the conical section is sleeved with an adjusting nut connected with the threaded connecting section, the adjusting nut is provided with a conical hole coaxially arranged with the conical section, the length of the conical hole is smaller than that of the conical section, and the inner diameter of a small-diameter port of the conical hole is matched with the outer diameter of a small-diameter end of the conical section; the wheel axle sleeve is provided with a position avoiding notch corresponding to the meshing position of the gear and the rack.

7. A microscope focusing apparatus according to claim 6, wherein: the wheel axle sleeve is an eccentric sleeve.