Upright microscope capable of conveniently replacing objective lens

Abstract

The upright microscope comprises a microscope body, a lens barrel, a switcher and the objective lens, the switcher comprises a switching disc, the switching disc is provided with an extension barrel used for being inserted into the objective lens in a penetrating mode, the switching disc is provided with a pre-locking assembly which penetrates into the extension barrel and is used for locking the objective lens, and the pre-locking assembly is provided with a locking assembly. The extension cylinder is also internally provided with an inner cylinder sleeved outside the objective lens, and the inner wall of the inner cylinder and the outer wall of the objective lens are provided with mutually corresponding discontinuous threads. According to the utility model, the objective lens is clamped and locked by arranging the pre-locking assembly, when the objective lens is used, the switcher is rotated, the inner cylinder is driven to rotate through the limiting groove, the discontinuous threads are engaged with each other to be stressed, and the objective lens is upwards propped and supported, so that the objective lens is accurately fixed, and at the moment, the inner cylinder receives the supporting force of the bottom wall; the inner cylinder losing the supporting force does not have supporting force on the objective lens, and the originally fastened thread structure automatically loosens and is convenient to disassemble.

Description

Technical Field

[0001] The utility model belongs to the field of microscopes, and particularly relates to an upright microscope with a conveniently replaceable objective lens. Background Technique

[0002] A microscope includes an objective lens, an eyepiece, a lens barrel, and a turret. Among them, objective lenses with different magnifications are arranged on the turret. The turret is rotatably arranged under the lens barrel and has gears for rotation. Then, by rotating the turret, different objective lenses can be switched.

[0003] The existing objective lens is connected to the turret by a thread. The advantage of the threaded connection is that the fixing position of the objective lens is accurate, and the required fixing position can be reached when tightened. The disadvantage is that the rotation stroke is long, and the thread needs to be repeatedly screwed during the tightening process and the disassembly process. Especially for users with less strength, assistance may even be required during the tightening and disassembly processes. Content of the Utility Model

[0004] The purpose of the utility model is to provide an upright microscope with a conveniently replaceable objective lens to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] An upright microscope with a conveniently replaceable objective lens includes a microscope body, a lens barrel, a switcher, and an objective lens. The switcher includes a switching disk. The switching disk is provided with an extension tube for inserting the objective lens. Among them, a pre-locking assembly for locking the objective lens is arranged on the switching disk and penetrates into the extension tube. An inner tube sleeving the outside of the objective lens is also arranged in the extension tube. Intermittent threads corresponding to each other are arranged between the inner wall of the inner tube and the outer wall of the objective lens. One side of the bottom end of the lens barrel is downwardly provided with an extension part. The extension part is provided with a limiting groove. The limiting groove includes a side wall and a bottom wall. The side wall is used to rotate the inner tube by friction, and the bottom wall is used to upwardly support the inner tube.

[0007] As a further optimized solution of the utility model, the microscope further includes an eyepiece arranged on the lens barrel, a stage arranged on the microscope body, and a light source.

[0008] As a further optimized solution of the utility model, the switching disk is rotatably arranged at the bottom of the lens barrel through a central axis, and a dust-proof part for covering the upper end of the switching disk is fixedly arranged at the bottom of the lens barrel. The dust-proof part is fixed below the lens barrel for dust-proofing the switching position at the upper end of the switcher.

[0009] As a further optimized solution of the present utility model, the pre-locking component is a pin structure, including a pin and a spring. An annular slot is provided on the side surface of the objective lens. The spring is used to push the pin into the slot to lock the objective lens. And a chamfer is provided at the lower end of the pin to facilitate the entry of the objective lens. This solution provides a pre-locking structure. Among them, the pre-locking is to temporarily fix the objective lens in the extension tube. In this solution, a pin and a spring are used for fixation, and other unlockable pre-locking components can also be used.

[0010] As a further optimized solution of the present utility model, the intermittent thread includes a first intermittent thread provided on the inner wall of the inner tube and a second intermittent thread provided on the surface of the objective lens. Both the first intermittent thread and the second intermittent thread are axially arranged in an array, and the length of the thread is less than the distance between the threads. The intermittent thread is used to fasten the objective lens when the objective lens is in use. Setting the thread intermittently facilitates the insertion of the objective lens into the inner tube without the need for step-by-step rotation. When in use, the inner tube is rotated through the side wall of the limiting groove, so that the first intermittent thread on the inner wall of the inner tube lifts the second intermittent thread on the surface of the objective lens upward, and the bottom wall is used to support the inner tube. The advantage of supporting the inner tube through the bottom wall is that when the inner tube leaves the limiting groove, the inner tube without support loses the fastening force of the thread, which is convenient for removal.

[0011] As a further optimized solution of the present utility model, an outer flange corresponding to the limiting groove is provided at the bottom of the inner tube. Vertical stripes are provided on the circumference of the outer flange, and rubber pads for increasing friction are provided on the side wall. The bottom wall is a slope with a gradually changing depth. This setting facilitates driving the inner tube to rotate.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The present utility model clamps and locks the objective lens by setting a pre-locking component. When using the objective lens, rotate the switcher, drive the inner tube to rotate through the limiting groove, bite and apply force to each other with the intermittent threads, push the objective lens upward and tightly hold it to achieve the purpose of precise fixation. At this time, the inner tube receives the supporting force of the bottom wall. When the objective lens rotates away, the inner tube without the supporting force will not have a supporting force on the objective lens either, and the originally fastened thread structure will automatically loosen, which is convenient for removal. Description of the Drawings

[0014] Figure 1 is the overall structural schematic diagram of the present utility model.

[0015] Figure 2 is the Figure 1 enlarged view of the structure of part A in the present utility model.

[0016] Figure 3 is the Figure 2 enlarged view of the structure of part B in the present utility model.

[0017] In the figure: 1. Microscope body; 2. Eyepiece tube; 3. Eyepiece; 4. Stage; 5. Switcher; 51. Switching disc; 52. Extension tube; 53. Pre-locking component; 54. Inner tube; 55. Outer flange; 56. First interrupted thread; 57. Dust-proof part; 6. Objective lens; 61. Second interrupted thread; 62. Card slot; 7. Extension part; 71. Limiting groove; 72. Bottom wall; 73. Side wall. Detailed implementation mode

[0018] The following further describes the present application in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation modes are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0019] Embodiment 1

[0020] As Figures 1-3 shown, an upright microscope with a conveniently replaceable objective lens includes a microscope body 1, an eyepiece tube 2, a switcher 5, and an objective lens 6. The switcher 5 includes a switching disc 51, and the switching disc 51 is provided with an extension tube 52 for inserting the objective lens 6. Among them, the switching disc 51 is provided with a pre-locking component 53 that penetrates into the extension tube 52 to lock the objective lens 6. An inner tube 54 sleeved outside the objective lens 6 is further provided in the extension tube 52. Interrupted threads corresponding to each other are provided on the inner wall of the inner tube 54 and the outer wall of the objective lens 6. One side of the bottom end of the eyepiece tube 2 is provided with an extension part 7 downward. The extension part 7 is provided with a limiting groove 71. The limiting groove 71 includes a side wall 73 and a bottom wall 72. The side wall 73 is used to rotate the inner tube 54 by friction, and the bottom wall 72 is used to support the inner tube 54 upward.

[0021] In this solution, the objective lens 6 is clamped and locked by setting the pre-locking component 53. During specific operation, only the objective lens 6 needs to be inserted into the inner tube 54 and the extension tube 52. When using the objective lens 6, rotate the switcher 5 to make the objective lens 6 reach the position aligned with the stage 4. During this process, the inner tube 54 is driven to rotate through the limiting groove 71, and the interrupted threads are engaged with each other to apply force, pushing the objective lens 6 upward and tightly supporting it to achieve the purpose of precise fixation. The lifting amplitude is very small, just pressing it tightly. At this time, the inner tube 54 receives the supporting force of the bottom wall 72. When the objective lens 6 rotates away, the inner tube 54 without the supporting force will not have a supporting force on the objective lens 6 either, and the originally tightened thread structure will automatically loosen, facilitating removal.

[0022] The microscope further includes an eyepiece 3 disposed on the lens barrel 2, a stage 4 disposed on the microscope body 1, and a light source. The switching disk 51 is rotatably disposed at the bottom of the lens barrel 2 through a central axis, and a dust-proof member 57 for covering the upper end of the switching disk 51 is fixedly disposed at the bottom of the lens barrel 2. These components are all prior arts of the microscope. The dust-proof member 57 is fixed below the lens barrel for dust-proofing when the switching position at the upper end of the switch 5, and the dust-proof member 57 is provided with an opening corresponding to the objective lens 6.

[0023] The pre-locking assembly 53 is a pin structure, including a pin and a spring. An annular slot 62 is disposed on the side surface of the objective lens 6. The spring is used to push the pin into the slot 62 to lock the objective lens 6, and a chamfer is provided at the lower end of the pin to facilitate the entry of the objective lens 6. This solution provides a pre-locking structure. Among them, the pre-locking is to temporarily fix the objective lens 6 in the extension tube 52. This solution uses a pin and a spring for fixation, and other pre-locking assemblies that are convenient for unlocking can also be used, such as the insertion locking and button unlocking structures in the prior art.

[0024] The intermittent thread includes a first intermittent thread 56 disposed on the inner wall of the inner tube 54 and a second intermittent thread 61 disposed on the surface of the objective lens 6. The first intermittent thread 56 and the second intermittent thread 61 are both axially arranged in an array, and the length of the thread is less than the spacing between the threads. The intermittent thread is used to fasten the objective lens 6 when the objective lens 6 is in use. Setting the thread intermittently facilitates the insertion of the objective lens 6 into the inner tube 54 without the need for step-by-step rotation. When in use, the inner tube 54 is rotated through the side wall 73 of the limiting groove 71, so that the first intermittent thread 56 on the inner wall of the inner tube 54 lifts the second intermittent thread 61 on the surface of the objective lens 6 upward, and the bottom wall 72 is used to support the inner tube 54. The advantage of supporting the inner tube 54 through the bottom wall 72 is that when the inner tube 54 leaves the limiting groove 71, the inner tube 54 that loses support loses the fastening force of the thread, which is convenient for removal.

[0025] An outer flange 55 corresponding to the limiting groove 71 is disposed at the bottom of the inner tube 54. Vertical stripes are provided on the circumference of the outer flange 55, and a rubber pad for increasing friction is disposed on the side wall 73. The bottom wall 72 is a slope with a gradually changing depth. This setting facilitates driving the inner tube 54 to rotate. It should be noted that since the rotation axis of the switch 5 does not coincide or is not parallel to the rotation axis of the inner tube 54, an appropriate angle should be set on the outside of the outer flange 55 so that when the switch 5 rotates, the outer flange 55 can still have good contact with the side wall of the limiting groove 71.

[0026] The specific implementation method is as follows: When installing the objective lens 6, it can be directly inserted and locked through the pre-locking component 53. When removing it, only need to release the pre-locking component 53 and slightly rotate the objective lens 6 to misalign the intermittent threads, then the objective lens 6 can be pulled out. When using this objective lens 6, rotate the switch 5. The switch 5 generally has rotation gears so that one of the objective lenses 6 is facing the stage 4. The inner cylinder 54 corresponding to this objective lens 6 is driven to rotate, pushing up the objective lens 6 to achieve the purpose of precise fastening. When continuing to switch, the inner cylinder 54 leaves the limiting groove 71. After losing support, the intermittent threads become loose due to the lack of locking force and can be easily removed. Although the inner cylinder 54 enters and exits the limiting groove 71 and also has a "tightening" process, the force arm for applying force is on the switching disc 51, with a large moment and more labor-saving.

[0027] The above-described embodiments only represent several implementation methods of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. An upright microscope with a conveniently replaceable objective lens, comprising a microscope body (1), a lens barrel (2), a switch (5) and an objective lens (6), characterized in that: The switch (5) comprises a switch disk (51), wherein the switch disk (51) is provided with an extension tube (52) for inserting an objective lens (6), wherein a pre-locking component (53) is provided on the switch disk (51) and is provided to penetrate into the extension tube (52) and is used to lock the objective lens (6), and an inner tube (54) is also provided in the extension tube (52) and is sleeved on the outside of the objective lens (6), and the inner wall of the inner tube (54) and the outer wall of the objective lens (6) are provided with corresponding discontinuous threads, and an extension portion (7) is provided downwardly at one side of the bottom end of the lens barrel (2), and the extension portion (7) is provided with a limiting groove (71), and the limiting groove (71) comprises a side wall (73) and a bottom wall (72), and the side wall (73) is used to rotate the inner tube (54) by friction, and the bottom wall (72) is used to lift the inner tube (54) upward.

2. The upright microscope with conveniently replaceable objective lens according to claim 1, characterized in that: The microscope also includes an eyepiece (3) arranged on the lens barrel (2), a stage (4) and a light source arranged on the microscope body (1).

3. The upright microscope with conveniently replaceable objective lens according to claim 2, characterized in that: The switching disk (51) is rotatably arranged at the bottom of the lens barrel (2) via a central axis, and a dustproof member (57) for covering the upper end of the switching disk (51) is also fixedly arranged at the bottom of the lens barrel (2).

4. The upright microscope with conveniently replaceable objective lens according to claim 1, characterized in that: The pre-locking assembly (53) is a bayonet structure, comprising a bayonet and a spring. An annular bayonet groove (62) is provided on the side of the objective lens (6). The spring is used to push the bayonet into the bayonet groove (62) to lock the objective lens (6). A chamfer is provided at the lower end of the bayonet to facilitate the entry of the objective lens (6).

5. The upright microscope with conveniently replaceable objective lens according to claim 1, characterized in that: The intermittent threads include a first intermittent thread (56) arranged on the inner wall of the inner cylinder (54), and a second intermittent thread (61) arranged on the surface of the objective lens (6); the first intermittent thread (56) and the second intermittent thread (61) are both distributed in an axial array, and the length of the thread is less than the spacing between the threads.

6. The upright microscope with conveniently replaceable objective lens according to claim 5, characterized in that: The bottom of the inner cylinder (54) is provided with an outer flange (55) corresponding to the limiting groove (71), the circumference of the outer flange (55) is provided with vertical stripes, the side wall (73) is provided with a rubber pad for increasing friction, and the bottom wall (72) is a slope with a gradually changing depth.

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