Microobjective turntable and microscope

Abstract

The invention provides a microscope objective turntable and a microscope, and the microscope objective turntable comprises a support, a rotating sleeve which is rotatably connected to the support, a turntable which is fixed on the rotating sleeve, and a supporting member which is respectively connected to the support and the turntable. The supporting piece comprises a first inner ring fixed to the support, a first outer ring which is fixed to the rotating disc and forms a first roller path with the first inner ring in an enclosing mode, and a plurality of first balls contained in the first roller path, and further comprises an annular retainer contained in the first roller path. The annular retainer is provided with a plurality of positioning holes distributed in the circumferential direction of the first roller path at intervals, and the first balls are assembled in the positioning holes in a one-to-one correspondence mode. The supporting piece is a four-point contact bearing, the precision and rigidity are higher, the precision of the microscope objective table can be higher, and the finished product performance of the microscope objective table is improved.

Description

[Technical field]

[0001] The present invention relates to the technical field of microscopes, and in particular to a microscope objective lens turntable and a microscope. [Background technology]

[0002] In the related art, the objective lens switching device of the microscope rotates the objective lens through a rotatable turntable to achieve the switching of different objective lenses. The inner and outer rings of the turntable are supported by bearings, wherein the center hole of the turntable is processed into a step shape, and the ball mounting surface of the motor support fixed to the base forms a conical surface, and a suitable number of balls are placed between the turntable surface and the motor support. The balls, the conical surface of the motor support and the stepped center hole of the turntable form a three-point contact bearing, that is, the inner ring of the turntable is supported by a three-point contact bearing. However, the accuracy and rigidity of the three-point contact bearing are poor, resulting in poor performance of the finished product of the microscope objective turntable.

[0003] Therefore, it is necessary to provide a new microscope objective turret. [Summary of the invention]

[0004] The purpose of the present invention is to provide a microscope objective turntable and a microscope, which can solve the technical problem in the related art that the inner ring of the turntable adopts three-point contact bearing support and has poor accuracy and rigidity.

[0005] The technical solution of the present invention is as follows:

[0006] A microscope objective turntable comprises a support, a rotating sleeve rotatably connected to the support, a turntable fixed to the rotating sleeve, and a support member respectively connected to the support and the turntable, the support member comprising a first inner ring fixed to the support, a first outer ring fixed to the turntable and enclosed with the first inner ring to form a first raceway, and a plurality of first balls accommodated in the first raceway, the support member also comprises an annular retaining frame accommodated in the first raceway, the annular retaining frame is provided with a plurality of positioning holes spaced apart along the circumferential direction of the first raceway, and a plurality of first balls are assembled in the plurality of positioning holes in a one-to-one correspondence.

[0007] Optionally, an insertion groove connected to the positioning hole is provided on one side of the annular retaining frame, and the insertion groove is provided with a first side wall and a second side wall spaced apart in the circumferential direction of the annular retaining frame, and the distance between the first side wall and the second side wall is greater than the diameter of the positioning hole.

[0008] Optionally, in a direction from the first inner circle to the first outer circle, a distance between the first side wall and the second side wall gradually decreases.

[0009] Optionally, a first gap is provided between the annular retaining frame and a side of the first inner ring close to the first outer ring, and a second gap is provided between the annular retaining frame and a side of the first outer ring close to the first inner ring.

[0010] Optionally, a first annular groove is provided on a side of the first inner ring close to the first outer ring, and a second annular groove is provided on a side of the first outer ring close to the first inner ring, the first annular groove and the second annular groove are both adapted to the first ball, and the first annular groove and the second annular groove are combined together to form the first raceway.

[0011] Optionally, the turntable is provided with a mounting hole, at least part of the support and the support member are accommodated in the mounting hole, and the first inner ring is sleeved and fixed on the outer side of the support, and the first outer ring is embedded in the mounting hole.

[0012] Optionally, a first limiting portion is provided on the inner circumferential wall of the mounting hole, and a second limiting portion is provided on the outer side of the support, the first limiting portion and the second limiting portion are spaced apart in the axial direction of the support member, and the first outer ring abuts against the first limiting portion, and the first inner ring abuts against the second limiting portion.

[0013] Optionally, the support member further includes a base fixed to the support and enclosed with the turntable to form a second raceway, and a plurality of second balls accommodated in the second raceway, and a diameter of the first raceway is smaller than a diameter of the second raceway.

[0014] Optionally, the second raceway is provided with a bottom wall arranged opposite to the base, and a third side wall and a fourth side wall connected to the bottom wall and arranged opposite to each other, the third side wall of the third side wall and the fourth side wall being closer to the support member, and the third side wall being inclined toward the support member.

[0015] A microscope comprises the microscope objective turret as described in any one of the above.

[0016] The beneficial effects of the present invention are as follows: by arranging an annular retaining frame between the first outer ring and the first inner ring, and assembling the plurality of first balls in the first raceway in a one-to-one correspondence in the plurality of positioning holes on the annular retaining frame, the support member is a four-point contact bearing. Compared with the three-point contact bearing in the related art, the four-point contact bearing has higher precision and rigidity, thereby making the precision of the microscope objective turntable higher and improving the finished product performance of the microscope objective turntable; moreover, the material and processing requirements of the support and the turntable can also be reduced, which is conducive to reducing costs.

Brief Description of the Drawings

[0017] Figure 1A schematic diagram of the structure of the microscope objective lens turntable provided by the present invention;

[0018] Figure 2 yes Figure 1 Sectional view along AA direction;

[0019] Figure 3 yes Figure 2 A magnified view of detail B;

[0020] Figure 4 yes Figure 2 A magnified view of detail C;

[0021] Figure 5 It is a schematic diagram of the assembly between the turntable, the support member and the second ball provided by the present invention;

[0022] Figure 6 It is a structural schematic diagram of the support member provided by the present invention;

[0023] Figure 7 It is an exploded view of the support member provided by the present invention. [Specific implementation method]

[0024] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0025] The present invention provides a microscope, comprising a microscope objective lens turret, and an eyepiece and a plurality of objective lenses arranged on the microscope objective lens turret, wherein the plurality of objective lenses are spaced apart along the circumferential direction, and the magnification of each objective lens is set differently. When the microscope objective lens turret is operated, the objective lens can be driven to rotate circumferentially, so that the eyepiece can match objective lenses of different magnifications.

[0026] See also Figures 1 to 7 The microscope objective turret comprises a support 1, a rotating sleeve 2 rotatably connected to the support 1, a turntable 3 fixed to the rotating sleeve 2, and a support member 4 respectively connected to the support 1 and the turntable 3, wherein the support member 4 comprises a first inner ring 41 fixed to the support 1, a first outer ring 42 fixed to the turntable 3 and enclosed with the first inner ring 41 to form a first raceway 45, and a plurality of first balls 43 accommodated in the first raceway 45. The support member 4 further comprises an annular retainer 44 accommodated in the first raceway 45, the annular retainer 44 is provided with a plurality of positioning holes 441 spaced apart and distributed along the circumferential direction of the first raceway 45, and the plurality of first balls 43 are assembled in the plurality of positioning holes 441 in a one-to-one correspondence.

[0027] By setting an annular retaining frame 44 between the first outer ring 42 and the first inner ring 41, and assembling the multiple first balls 43 in the first raceway 45 in the multiple positioning holes 441 on the annular retaining frame 44 one by one, the support member 4 is made into a four-point contact bearing. Compared with the three-point contact bearing in the related art, the four-point contact bearing has higher precision and rigidity, so that the precision of the microscope objective turntable is higher and the finished product performance of the microscope objective turntable is improved; moreover, the material and processing requirements of the support 1 and the turntable 3 can also be reduced, which is conducive to reducing costs.

[0028] It should be noted that the multiple positioning holes 441 on the annular retaining frame 44 are preferably distributed at equal intervals, the first balls 43 can be steel balls, the number of the first balls 43 is the same as the number of the positioning holes 441, and the number of the first balls 43 is set according to actual needs. For example, the number of the first balls 43 can be five, ten, twelve, twenty, thirty, etc.

[0029] See also Figure 6 and Figure 7 , an insertion groove 442 communicating with the positioning hole 441 is provided on one side of the annular retainer 44, and the insertion groove 442 is provided with a first side wall 443 and a second side wall 444 spaced apart in the circumferential direction of the annular retainer 44, and the distance between the first side wall 443 and the second side wall 444 is greater than the diameter of the positioning hole 441, so that the groove width of the insertion groove 442 is greater than the diameter of the positioning hole 441, and the diameter of the positioning hole 441 is adapted to the diameter of the first ball 43, so that the first ball 43 can pass through the insertion groove 442 and be assembled in the positioning hole 441. Moreover, the insertion groove 442 can also guide the first ball 43 to be assembled in the positioning hole 441.

[0030] It should be noted that during the assembly of the support member 4, the first ball 43 can be first assembled in the first raceway 45, and then the annular retaining frame 44 can be inserted into the first raceway 45. The first ball 43 will be inserted into the positioning hole 441 along the insertion groove 442, thereby completing the assembly of the support member 4. The assembly method is simple and convenient.

[0031] See also Figure 6 and Figure 7 In the direction from the first inner ring 41 to the first outer ring 42, the distance between the first side wall 443 and the second side wall 444 gradually decreases, which is beneficial to prevent the first ball 43 from escaping from the annular retaining frame 44, and at the same time, it can also ensure the smoothness of the first ball 43 rolling in the first raceway 45.

[0032] See also Figure 3 , Figure 5 and Figure 6A first gap 46 is defined between the annular retainer 44 and the side of the first inner ring 41 close to the first outer ring 42, and a second gap 47 is defined between the annular retainer 44 and the side of the first outer ring 42 close to the first inner ring 41, so that the annular retainer 44 does not contact the first inner ring 41 and the first outer ring 42, thereby preventing the annular retainer 44 from hindering the relative movement between the first inner ring 41 and the first outer ring 42; moreover, it is also beneficial for the first ball 43 to drive the annular retainer 44 to move in the first raceway 45.

[0033] See also Figure 6 and Figure 7 A first annular groove 411 is provided on one side of the first inner ring 41 close to the first outer ring 42, and a second annular groove 421 is provided on one side of the first outer ring 42 close to the first inner ring 41. Both the first annular groove 411 and the second annular groove 421 are adapted to the first ball 43, and the first annular groove 411 and the second annular groove 421 are combined to form the first raceway 45. The first annular groove 411 and the second annular groove 421 are both arc-shaped grooves. When the first ball 43 is accommodated in the first raceway 45, the first ball 43 is confined in the first raceway 45 by the groove shapes of the first annular groove 411 and the second annular groove 421.

[0034] See also Figure 2 , Figure 3 and Figure 5 The turntable 3 is provided with a mounting hole 31, at least part of the support 1 and the support member 4 are received in the mounting hole 31, and the first inner ring 41 is sleeved and fixed on the outer side of the support 1, and the first outer ring 42 is embedded in the mounting hole 31, so that the support member 4 can support the turntable 3 while ensuring that the turntable 3 can rotate relative to the support 1. According to actual needs, the middle part of the support 1 is received in the mounting hole 31, and both ends of the support 1 are located outside the mounting hole 31.

[0035] See also Figure 2 and Figure 3 A first limiting portion 32 is provided on the inner peripheral wall of the mounting hole 31, and a second limiting portion 11 is provided on the outer side of the support 1. The first limiting portion 32 and the second limiting portion 11 are spaced apart in the axial direction of the support member 4, and the first outer ring 42 abuts against the first limiting portion 32, and the first inner ring 41 abuts against the second limiting portion 11. By providing the first limiting portion 32 and the second limiting portion 11, the support member 4 can be prevented from moving in the axial direction, thereby improving the stability of the rotation of the turntable 3.

[0036] See also Figure 1 and Figure 2The microscope objective turret also includes a driving source 6 fixed to the support 1, and a transmission mechanism 7 arranged on the support 1 and connected to the driving source 6 and the rotating sleeve 2 respectively. The transmission mechanism 7 includes a base 71 fixed to one end of the support 1 away from the first inner ring 41, a first gear 72 rotatably connected to the base 71 and connected to the driving source 6, and a second gear 73 fixed to the rotating sleeve 2 and meshingly assembled with the first gear 72. The rotating sleeve 2 is sleeved on the outer side of the support 1, and the rotating sleeve 2 is arranged on the side of the first outer ring 42 away from the first limiting portion 32, and the second gear 73 is arranged at one end of the rotating sleeve 2 away from the first outer ring 42. Among them, the driving source 6 can be a DC motor with output teeth, the driving source 6 drives the first gear 72 to rotate, the first gear 72 can be a planetary gear, and two first gears 72 can be provided. The two first gears 72 are arranged on opposite sides of the output teeth of the DC motor. The provision of two first gears 72 is conducive to stably transmitting the power of the driving source 6 to the second gear 73. The second gear 73 cooperates with the first gear 72 to rotate and drive the rotating sleeve 2 to rotate. The second gear 73 can provide deceleration and transmit power to the rotating sleeve 3. The rotating sleeve 2 drives the turntable 3 to rotate, so that the rotating sleeve 2 can transmit the power of the driving source 6 to the turntable 3.

[0037] See also Figure 2 and Figure 4 The support member 4 further includes a base 5 fixed to the support 1 and enclosed with the turntable 3 to form a second raceway 33, and a plurality of second balls 8 received in the second raceway 33. The diameter of the first raceway 45 is smaller than the diameter of the second raceway 33, that is, the first raceway 45 is located in the second raceway 33. A two-point contact bearing is formed between the base 5, the second balls 8 and the turntable 3, so that the turntable 3 can rotate relative to the base 5 while supporting the base 5. The number of the second balls 8 is set according to actual needs, such as six, ten, fifteen, twenty, etc.

[0038] See also Figure 2 and Figure 4 The second raceway 33 is provided with a bottom wall 331 arranged opposite to the base 5, and a third side wall 332 and a fourth side wall 333 connected to the bottom wall 331 and arranged opposite to each other. The third side wall 332 of the third side wall 332 and the fourth side wall 333 is closer to the support member 4, and the third side wall 332 is inclined toward the support member 4 to facilitate the second ball 8 to roll in the second raceway 33.

[0039] It should be noted that the base 5 can provide overall support for the microscope objective turret. Since the support member 4 is respectively connected to the support 1 and the turntable 3, the support member 4 can support the rotation of the turntable 3. The second ball 8 is arranged in the second raceway 33, and the second ball 8 is in contact with the turntable 3 and the base 5 respectively, so that the second ball 8 can provide vertical support for the turntable 3.

[0040] See also Figure 1 and Figure 2 The turntable 3 is provided with a plurality of objective lens threaded holes 34, and the plurality of objective lenses are assembled in the plurality of objective lens threaded holes 34 in a one-to-one correspondence; the base 5 is provided with an eyepiece threaded hole 51, and the eyepiece is assembled in the eyepiece threaded hole 51. When the driving source 6 drives the rotating sleeve 2 to rotate, and the turntable 3 rotates under the drive of the rotating sleeve 2, one of the plurality of objective lenses can be rotated to be arranged opposite to the eyepiece, so that the eyepiece can be matched with objective lenses of different magnifications, and the magnification of the microscope can be adjusted.

[0041] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A microscope objective turret, comprising a support, a rotating sleeve rotatably connected to the support, a turntable fixed to the rotating sleeve, and a support member respectively connected to the support and the turntable, wherein the support member comprises a first inner ring fixed to the support, a first outer ring fixed to the turntable and enclosing the first inner ring to form a first raceway, and a plurality of first balls accommodated in the first raceway, characterized in that: The support member also includes an annular retaining frame received in the first raceway, the annular retaining frame is provided with a plurality of positioning holes spaced apart and distributed along the circumferential direction of the first raceway, and the plurality of first balls are assembled in the plurality of positioning holes in a one-to-one correspondence.

2. The microscope objective turret according to claim 1, characterized in that: An insertion groove connected to the positioning hole is provided on one side of the annular retainer, and the insertion groove is provided with a first side wall and a second side wall spaced apart in the circumferential direction of the annular retainer, and a distance between the first side wall and the second side wall is greater than a diameter of the positioning hole.

3. The microscope objective turret according to claim 2, characterized in that: In a direction from the first inner circle to the first outer circle, a distance between the first side wall and the second side wall gradually decreases.

4. The microscope objective turret according to claim 1, characterized in that: A first gap is formed between the annular retaining frame and a side of the first inner ring close to the first outer ring, and a second gap is formed between the annular retaining frame and a side of the first outer ring close to the first inner ring.

5. The microscope objective turret according to claim 1, characterized in that: A first annular groove is provided on one side of the first inner ring close to the first outer ring, and a second annular groove is provided on one side of the first outer ring close to the first inner ring. Both the first annular groove and the second annular groove are adapted to the first ball, and the first annular groove and the second annular groove are combined together to form the first raceway.

6. The microscope objective turret according to claim 1, characterized in that: The turntable is provided with a mounting hole, in which at least a part of the support and the supporting member are accommodated, and the first inner ring is sleeved and fixed on the outer side of the support, and the first outer ring is embedded in the mounting hole.

7. The microscope objective turret according to claim 6, characterized in that: A first limiting portion is arranged on the inner circumferential wall of the mounting hole, and a second limiting portion is arranged on the outer side of the support, the first limiting portion and the second limiting portion are spaced apart in the axial direction of the support member, and the first outer ring abuts against the first limiting portion, and the first inner ring abuts against the second limiting portion.

8. The microscope objective turret according to claim 1, characterized in that: The support member also includes a base fixed to the support and enclosed with the turntable to form a second rolling track, and a plurality of second balls accommodated in the second rolling track. The diameter of the first rolling track is smaller than the diameter of the second rolling track.

9. The microscope objective turret according to claim 8, characterized in that: The second raceway is provided with a bottom wall opposite to the base, and a third side wall and a fourth side wall connected to the bottom wall and opposite to each other, wherein the third side wall is closer to the support member and the third side wall is inclined toward the support member.

10. A microscope, characterized in that: It comprises a microscope objective turret as described in any one of claims 1 to 9.

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