Rapid positioning and locking device for microscope objective lens

Abstract

The invention belongs to the technical field of microscope objective lenses, and discloses a rapid positioning and locking device for a microscope objective lens, which comprises a locking sleeve, a locking mechanism mounted in the locking sleeve, a limiting mechanism mounted in the locking mechanism, an objective lens main body slidably connected in the locking sleeve, and a limiting rod slidably connected in the locking sleeve. Through cooperation of structures such as the pressing sleeve, the pressing rods and a first reset spring, the device can rapidly position and lock an objective lens body, the objective lens switching efficiency is improved, the pressing sleeve with anti-skid lines is pressed, the four sets of pressing rods in an annular array are driven to move downwards, the inclined face of the bottom end of the pressing sleeve extrudes the guide groove of the limiting rod, and the objective lens switching efficiency is improved. The first reset spring pushes the pressing sleeve to reset, the second reset spring pulls the limiting rod to be inserted into an opening groove of the objective lens body, repeated rotation is not needed, and finally the effects of rapid disassembly and assembly and guarantee of positioning precision are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of microscope objective lenses, and particularly relates to a quick positioning and locking device for a microscope objective lens. BACKGROUND

[0002] As a core observation tool in the fields of life science, material science and precision manufacturing, a microscope directly influences the accuracy of observation results and the smoothness of a work process through the installation precision and switching efficiency of an objective lens. The objective lens, as a key imaging component of the microscope, needs to be stably connected with a lens barrel or an objective lens converter through a locking device, and meanwhile needs to meet the use demand of frequently replacing objective lenses with different magnifications. Therefore, strict requirements are put forward for the positioning precision, locking reliability and operation convenience of the locking device. The locking device of the existing microscope objective lens is fixed through the thread cooperation between the outer wall of the objective lens and the mounting seat. Although the connection is stable, the operation is complicated, and the objective lens needs to be repeatedly rotated for multiple rounds to complete locking or dismounting each time the objective lens is replaced, so the switching efficiency is low, and the positioning precision is reduced due to the thread wear after long-term use.

[0003] Publication No. CN110119013A discloses a movable mechanism locking structure, an installation method thereof and an objective lens. The movable mechanism locking structure comprises a pre-pressing assembly, a limiting assembly, an adjusting assembly and a locking assembly. The adjusting assembly is threadedly connected with the bottom surface. The limiting assembly is sleeved on the adjusting assembly and arranged on the two first step surfaces. The lens seat is arranged on the limiting assembly. The pre-pressing assembly is arranged on the lens seat and pre-tightens the second step surface and the lens seat. The locking assembly locks the adjusting assembly through the limiting assembly. The movable mechanism locking structure has high stability and precision. The installation method of the movable mechanism locking structure is simple and fast.

[0004] The device can clamp the objective lens during use, but it needs to be adjusted through threads, and the objective lens needs to be repeatedly rotated for multiple rounds to complete locking or dismounting each time the objective lens is replaced, so the switching efficiency is low. Therefore, the quick positioning and locking device for the microscope objective lens is proposed, which realizes the quick insertion, automatic locking and convenient dismounting of the objective lens. SUMMARY

[0005] To solve the problems in the background art, the application provides a quick positioning and locking device for a microscope objective lens.

[0006] To achieve the above object, the application provides the following technical scheme: a quick positioning and locking device for a microscope objective lens, comprising a locking sleeve, a locking mechanism is arranged in the locking sleeve, a limiting mechanism is arranged in the locking mechanism, and an objective lens body is slidably connected in the locking sleeve. The locking mechanism includes a pressure sleeve, a pressure rod, and a first return spring. The pressure sleeve is slidably connected inside the locking sleeve. The pressure rod is fixed at the bottom end of the pressure sleeve, and the first return spring is fixed at the bottom end of the pressure sleeve. A limit rod is slidably connected inside the locking sleeve, and a guide groove is provided at the top end of the limit rod. The limiting mechanism includes a support base, a support rod, and a first guide plate. The support base is fixed to the bottom end of the pressure sleeve, the support rod is fixed to the bottom end of the support base, the first guide plate is fixed to the bottom end of the support rod, and a second guide plate is slidably connected to the outside of the support rod.

[0007] Preferably, a second return spring is sleeved on the outside of the limiting rod, and an airbag is fixed at the bottom of the inside of the locking sleeve, with an air guide tube connected to the bottom of the airbag.

[0008] Preferably, the pressure sleeve is annular, and its outer wall is fixed with several sets of anti-slip textures. The anti-slip textures are arranged at equal intervals about the central axis of the pressure sleeve. The outer wall of the pressure rod fits against the inner wall of the locking sleeve. There are four sets of pressure rods, which are arranged in a circular array about the central axis of the pressure sleeve. The anti-slip textures arranged at equal intervals on the outer wall of the pressure sleeve can increase the contact friction between the hand and the pressure sleeve. Even if the hand is contaminated with oil or slightly damp, it can still apply pressure stably, avoiding slippage during operation and ensuring smooth downward movement of the pressure sleeve. This lays the foundation for the synchronous extension and retraction of the subsequent limit rod and reduces the risk of operational errors caused by slippage.

[0009] Preferably, the first return spring is used to compress the pressure sleeve, one end of the first return spring is fixedly connected to the pressure sleeve, and the other end of the first return spring is fixedly connected to the locking sleeve.

[0010] Preferably, four sets of limiting rods are provided, arranged in a circular array about the central axis of the locking sleeve. The outer wall of the limiting rod is attached to the inner wall of the objective lens body, and the limiting rod and the objective lens body are slidably connected. The guide groove has an inclined surface inside. The four sets of limiting rods are arranged in a circular array about the central axis of the locking sleeve, which can apply radial limiting force synchronously from all sides of the objective lens body. Combined with the fitting design of the outer wall of the limiting rod and the inner wall of the objective lens body, it ensures that the objective lens body always remains coaxial with the locking sleeve after being inserted into the locking sleeve, avoiding optical center deviation caused by objective lens installation offset, ensuring imaging accuracy during microscope observation, and meeting the stringent requirements of objective lens installation coaxiality for precision observation.

[0011] Preferably, one end of the second return spring is fixedly connected to the limiting rod, and the other end of the second return spring is fixedly connected to the locking sleeve. The second return spring is used to pull the limiting rod. There are two sets of airbags and air ducts, and the airbags and air ducts are symmetrically distributed.

[0012] Preferably, the locking sleeve has a slot inside, a connecting rod is slidably connected inside the locking sleeve, a third return spring is sleeved on the outside of the connecting rod, and a limit block is fixed on the outside of the connecting rod.

[0013] Preferably, four sets of support seats are provided, arranged in a circular array about the central axis of the locking sleeve. The bottom end of the first guide plate has an inclined surface, and the top end of the second guide plate has an inclined surface. The inner wall of the second guide plate is in contact with the outer wall of the support rod. The outer diameter of the second guide plate is larger than that of the first guide plate. The four sets of support seats are arranged in a circular array about the central axis of the locking sleeve and can move down synchronously with the pressure sleeve, driving the four sets of support rods and the first guide plate to act evenly on the limiting block. This avoids the limiting mechanism from shifting due to unilateral force. The synchronous action characteristic ensures that the limiting block is subjected to balanced force, preventing component deformation caused by local stress concentration. This ensures that the unlocking and locking functions of the limiting mechanism on the pressure sleeve are stable and reliable, and is suitable for frequent pressing operations.

[0014] Preferably, the slots are provided in four sets, the outer wall of the connecting rod is fitted to the inner wall of the locking sleeve, and there are two sets of connecting rods, which are symmetrically distributed about the central axis of the slot.

[0015] Preferably, one end of the third return spring is fixedly connected to the connecting rod, and the other end of the third return spring is fixedly connected to the locking sleeve. The third return spring is used to press the connecting rod, and the surface of the limiting block is provided with an inclined surface.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the coordinated use of a pressure sleeve, pressure rods, and a first return spring, enables the device to quickly position and lock the objective lens body, improving objective lens switching efficiency. Pressing the pressure sleeve with anti-slip texture moves the four sets of ring-shaped pressure rods downward. The inclined surface at the bottom of the pressure sleeve presses against the guide groove of the limiting rod, causing the limiting rod to move outward and disengage from the locking sleeve. After inserting into the objective lens body, releasing the pressure sleeve causes the first return spring to push the pressure sleeve back to its original position, and the second return spring pulls the limiting rod into the slot of the objective lens body. This eliminates the need for repeated rotation, ultimately achieving the effect of rapid assembly and disassembly while ensuring positioning accuracy.

[0017] This invention, through the coordinated arrangement of a support base, a support rod, and a first guide plate, enables the device to assist the locking mechanism in maintaining an unlocked state, facilitating precise objective lens insertion. The four sets of annular array support bases move downwards with the pressure sleeve, causing the support rod and the first guide plate to press against the limiting block. After the third return spring resets, the limiting block locks the first guide plate, maintaining the limiting rod in an unlocked state. After the objective lens is aligned, pressing the pressure sleeve again causes the second guide plate to press against the limiting block, and the first return spring pulls the pressure sleeve back to its original position. Ultimately, this achieves the effect of simplifying operation and ensuring the accuracy of objective lens insertion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged cross-sectional view of a portion of point A in the middle section; Figure 4 This is a schematic diagram of the locking mechanism structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged cross-sectional view of section B in the middle section; Figure 6 This is a schematic diagram of the locking mechanism of the present invention; Figure 7 This is a schematic diagram of the overall separate bottom view structure of the present invention.

[0019] In the diagram: 1. Locking sleeve; 2. Locking mechanism; 201. Pressure sleeve; 202. Pressure rod; 203. First return spring; 204. Limiting rod; 205. Guide groove; 206. Second return spring; 207. Airbag; 208. Air duct; 3. Limiting mechanism; 301. Support base; 302. Support rod; 303. First guide plate; 304. Second guide plate; 305. Slot; 306. Connecting rod; 307. Third return spring; 308. Limiting block; 4. Objective lens body. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 7 As shown, the present invention provides a quick positioning and locking device for microscope objectives, including a locking sleeve 1, a locking mechanism 2 installed inside the locking sleeve 1, a limiting mechanism 3 installed inside the locking mechanism 2, and an objective body 4 slidably connected inside the locking sleeve 1.

[0022] like Figures 1 to 6As shown, the locking mechanism 2 includes a pressure sleeve 201, a pressure rod 202, and a first return spring 203. The pressure sleeve 201 is slidably connected inside the locking sleeve 1. The pressure rod 202 is fixed to the bottom end of the pressure sleeve 201, and the first return spring 203 is also fixed to the bottom end of the pressure sleeve 201. A limit rod 204 is slidably connected inside the locking sleeve 1. A guide groove 205 is provided at the top end of the limit rod 204, and a second return spring 206 is sleeved on the outside of the limit rod 204. An airbag 207 is fixed to the bottom end inside the locking sleeve 1, and an air duct 208 is connected to the bottom end of the airbag 207. The pressure sleeve 201 is annular, and several sets of anti-slip patterns are fixed to the outer wall of the pressure sleeve 201. The anti-slip patterns are arranged at equal intervals about the central axis of the pressure sleeve 201. The outer wall of the pressure rod 202 fits against the inner wall of the locking sleeve 1. There are four sets of pressure rods 202. The central axis of 201 is arranged in a circular array. The first return spring 203 is used to squeeze the pressure sleeve 201. One end of the first return spring 203 is fixedly connected to the pressure sleeve 201, and the other end of the first return spring 203 is fixedly connected to the locking sleeve 1. Four sets of limiting rods 204 are provided. The limiting rods 204 are arranged in a circular array about the central axis of the locking sleeve 1. The outer wall of the limiting rod 204 is attached to the inner wall of the objective lens body 4. The limiting rod 204 and the objective lens body 4 are slidably connected. The guide groove 205 has an inclined surface inside. One end of the second return spring 206 is fixedly connected to the limiting rod 204, and the other end of the second return spring 206 is fixedly connected to the locking sleeve 1. The second return spring 206 is used to pull the limiting rod 204. Two sets of airbags 207 and air guide tubes 208 are provided. The airbags 207 and air guide tubes 208 are symmetrically distributed.

[0023] The above scheme is adopted as follows: by pressing down on the pressure sleeve 201, the pressure sleeve 201 and the pressure rod 202 move down. When the pressure sleeve 201 moves down, the inclined surface at the bottom of the pressure sleeve 201 squeezes the guide groove 205, causing the limiting rod 204 to move outward and disengage from the inside of the locking sleeve 1. At this time, the slot at the top of the objective lens body 4 is aligned with the positioning block inside the locking sleeve 1 and inserted. After the insertion is completed, the hand is released. At this time, the first return spring 203 resets the pressure sleeve 201 and the pressure rod 202. After the limiting rod 204 is no longer squeezed, the second return spring 206 resets the limiting rod 204, so that the limiting rod 204 is inserted into the slot opened on the outside of the objective lens body 4, thereby completing the quick positioning and locking of the objective lens body 4.

[0024] like Figures 1 to 5As shown, the limiting mechanism 3 includes a support base 301, a support rod 302, and a first guide plate 303. The support base 301 is fixed to the bottom end of the pressure sleeve 201. The support rod 302 is fixed to the bottom end of the support base 301, and the first guide plate 303 is fixed to the bottom end of the support rod 302. A second guide plate 304 is slidably connected to the outside of the support rod 302. Four sets of support bases 301 are arranged in a circular array about the central axis of the locking sleeve 1. The bottom end of the first guide plate 303 has an inclined surface, and the top end of the second guide plate 304 has an inclined surface. The inner wall of the second guide plate 304 fits against the outer wall of the support rod 302, and the outer diameter of the second guide plate 304 is larger than that of the first guide plate 303. The outer diameter is 3. The locking sleeve 1 has a slot 305 inside. The locking sleeve 1 has a connecting rod 306 slidably connected inside. There are four sets of slots 305. The outer wall of the connecting rod 306 fits against the inner wall of the locking sleeve 1. There are two sets of connecting rods 306. The connecting rods 306 are symmetrically distributed about the central axis of the slots 305. A third return spring 307 is sleeved on the outside of the connecting rod 306. A limit block 308 is fixed on the outside of the connecting rod 306. One end of the third return spring 307 is fixedly connected to the connecting rod 306. The other end of the third return spring 307 is fixedly connected to the locking sleeve 1. The third return spring 307 is used to squeeze the connecting rod 306. The surface of the limit block 308 has a bevel.

[0025] The above scheme is adopted as follows: After pressing the sleeve 201, the support rod 302 is driven to move downward, so that the support rod 302 squeezes the two sets of limiting blocks 308. After passing the limiting blocks 308, the restoring force of the third reset spring 307 makes the limiting blocks 308 reset and able to lock the first guide plate 303, so that it cannot be reset upward by the restoring force of the first reset spring 203. After the alignment of the objective lens body 4 is completed, the sleeve 201 is pressed down again, and the second guide plate 304 squeezes the two sets of limiting blocks 308. After passing the limiting blocks 308, the restoring force of the first reset spring 203 provides an upward pulling force, which, together with the restoring force of the third reset spring 307, makes the limiting blocks 308 push the second guide plate 304 against the first guide plate 303. The second guide plate 304 and the first guide plate 303 are in contact. At this time, the pulling force of the first reset spring 203 completes the reset of the sleeve 201 and the removal of the first guide plate 303.

[0026] The working principle and usage process of this invention are as follows: First, by pressing down on the pressure sleeve 201, the pressure sleeve 201 and the pressure rod 202 move downward. Then, when the pressure sleeve 201 moves downward, the inclined surface at the bottom of the pressure sleeve 201 squeezes the guide groove 205, causing the limiting rod 204 to move outward and disengage from the inside of the locking sleeve 1. At this time, the slot at the top of the objective lens body 4 is aligned with the positioning block inside the locking sleeve 1 and inserted. After insertion, the pressure sleeve 201 and the pressure rod 202 are reset by the first return spring 203. After the limiting rod 204 is no longer squeezed, the second return spring 206 resets the limiting rod 204, so that the limiting rod 204 is inserted into the slot opened on the outside of the objective lens body 4, thereby completing the quick positioning and locking of the objective lens body 4.

[0027] Finally, by pressing the sleeve 201, the support rod 302 is moved downward, causing it to press against the two sets of limiting blocks 308. After passing the limiting blocks 308, the restoring force of the third return spring 307 causes the limiting blocks 308 to reset and lock the first guide plate 303, preventing it from resetting upward by the restoring force of the first return spring 203. After aligning the objective lens body 4, the sleeve 201 is pressed downward again, and the second guide plate 304 presses against the two sets of limiting blocks 308. After passing the limiting blocks 308, the restoring force of the first return spring 203 provides an upward pulling force, which, together with the restoring force of the third return spring 307, causes the limiting blocks 308 to push the second guide plate 304 against the first guide plate 303. The second guide plate 304 and the first guide plate 303 are then in contact. At this point, the pulling force of the first return spring 203 completes the reset of the sleeve 201 and the removal of the first guide plate 303.

[0028] The equally spaced anti-slip texture on the outer wall of the pressure sleeve 201 increases the contact friction between the hand and the pressure sleeve 201, making it easier to apply force during pressing and preventing slippage. The outer walls of the four sets of ring array pressure rods 202 fit against the inner wall of the locking sleeve 1, ensuring that the pressure sleeve 201 is subjected to balanced force when it moves down without deviation or tilting, and ensuring that the limiting rod 204 moves synchronously. The two ends of the first return spring 203 are fixed to the pressure sleeve 201 and the locking sleeve 1 respectively. Its elastic deformation stores the mechanical energy during pressing. After releasing, it quickly pushes the pressure sleeve 201 back to its original position through the restoring force, providing power for the limiting rod 204 to lock the objective lens body 4.

[0029] The inclined surface of the guide groove 205 of the limiting rod 204 fits against the inclined surface at the bottom of the pressure sleeve 201, converting the axial pressure of the pressure sleeve 201 into the radial movement force of the limiting rod 204, thus achieving smooth extension and retraction of the limiting rod 204. The four sets of symmetrically distributed limiting rods 204 simultaneously abut against the outer wall of the objective lens body 4, positioning the objective lens body 4 from all sides, ensuring accurate coaxiality of the objective lens body 4 after installation, and avoiding deviation that affects observation accuracy. The second reset spring 206 continuously pulls the limiting rod 204 to ensure that the limiting rod 204 fits tightly against the slot of the objective lens body 4, enhancing locking stability and preventing the objective lens body 4 from loosening due to vibration during microscope use.

[0030] When the objective lens body 4 is inserted into the locking sleeve 1, its bottom end squeezes the air bladder 207. The gas in the air bladder 207 is discharged through the air guide tube 208, causing the gas to blow towards the objective lens body 4, thereby cleaning the outer wall of the objective lens body 4 with air.

[0031] The inner wall of the second guide plate 304 is attached to the outer wall of the support rod 302 and can slide freely along the support rod 302. Its top inclined surface is adapted to the bottom inclined surface of the first guide plate 303. When the pressure sleeve 201 is pressed for the second time, the second guide plate 304 squeezes the limiting block 308, releasing the limitation on the first guide plate 303. The restoring force of the first return spring 203 drives the pressure sleeve 201 to move upward. At the same time, the third return spring 307 pushes the limiting block 308 to press the second guide plate 304 tightly, so that the second guide plate 304 and the first guide plate 303 are closely attached to each other, ensuring that the two move synchronously during subsequent pressing operations.

[0032] The slot 305 provides installation space for the connecting rod 306. The outer walls of the two symmetrically distributed connecting rods 306 are fitted against the inner wall of the locking sleeve 1, restricting the connecting rods 306 to slide only laterally. This ensures the precise movement of the limiting block 308. Through the coordinated operation of the mechanical structure, the entire device enables the rapid insertion, automatic locking, and convenient disassembly of the objective lens body 4 without repeated rotation, greatly improving the efficiency of objective lens switching. At the same time, multiple sets of guide and limiting structures ensure installation accuracy, avoid wear problems caused by threaded connections, extend the service life of the device, and adapt to the needs of microscopes that require frequent objective lens replacement.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-positioning and locking device for microscope objectives, comprising a locking sleeve (1), characterized in that: The locking sleeve (1) is equipped with a locking mechanism (2), the locking mechanism (2) is equipped with a limiting mechanism (3), and the locking sleeve (1) is slidably connected to the objective lens body (4). The locking mechanism (2) includes a pressure sleeve (201), a pressure rod (202), and a first return spring (203). The pressure sleeve (201) is slidably connected inside the locking sleeve (1). The pressure rod (202) is fixed at the bottom end of the pressure sleeve (201), and the first return spring (203) is fixed at the bottom end of the pressure sleeve (201). A limit rod (204) is slidably connected inside the locking sleeve (1), and a guide groove (205) is provided at the top end of the limit rod (204). The limiting mechanism (3) includes a support base (301), a support rod (302) and a first guide plate (303). The support base (301) is fixed to the bottom end of the pressure sleeve (201). The support rod (302) is fixed to the bottom end of the support base (301). The first guide plate (303) is fixed to the bottom end of the support rod (302). The second guide plate (304) is slidably connected to the outside of the support rod (302).

2. The quick positioning and locking device for microscope objectives according to claim 1, characterized in that: The limiting rod (204) is fitted with a second reset spring (206), and the bottom of the locking sleeve (1) is fixed with an airbag (207), and the bottom of the airbag (207) is connected to an air duct (208).

3. The quick positioning and locking device for microscope objectives according to claim 1, characterized in that: The pressure sleeve (201) is annular, and the outer wall of the pressure sleeve (201) is fixed with several sets of anti-slip patterns. The anti-slip patterns are arranged at equal intervals about the central axis of the pressure sleeve (201). The outer wall of the pressure rod (202) is attached to the inner wall of the locking sleeve (1). There are four sets of pressure rods (202), and the pressure rods (202) are arranged in a ring array about the central axis of the pressure sleeve (201).

4. The quick positioning and locking device for microscope objectives according to claim 1, characterized in that: The first return spring (203) is used to press the pressure sleeve (201). One end of the first return spring (203) is fixedly connected to the pressure sleeve (201), and the other end of the first return spring (203) is fixedly connected to the locking sleeve (1).

5. The quick positioning and locking device for microscope objectives according to claim 2, characterized in that: The limiting rod (204) is provided in four sets. The limiting rod (204) is arranged in a ring array about the central axis of the locking sleeve (1). The outer wall of the limiting rod (204) is attached to the inner wall of the objective lens body (4). The limiting rod (204) and the objective lens body (4) are slidably connected. The guide groove (205) has an inclined surface inside.

6. The quick positioning and locking device for microscope objectives according to claim 2, characterized in that: One end of the second return spring (206) is fixedly connected to the limiting rod (204), and the other end of the second return spring (206) is fixedly connected to the locking sleeve (1). The second return spring (206) is used to pull the limiting rod (204). There are two sets of airbags (207) and air ducts (208), and the airbags (207) and air ducts (208) are symmetrically distributed.

7. The quick positioning and locking device for microscope objectives according to claim 1, characterized in that: The locking sleeve (1) has a slot (305) inside, and a connecting rod (306) is slidably connected inside the locking sleeve (1). A third return spring (307) is sleeved on the outside of the connecting rod (306), and a limit block (308) is fixed on the outside of the connecting rod (306).

8. The quick positioning and locking device for microscope objectives according to claim 1, characterized in that: The support base (301) is provided in four sets. The support base (301) is arranged in a ring array about the central axis of the locking sleeve (1). The bottom end of the first guide plate (303) is provided with an inclined surface, and the top end of the second guide plate (304) is provided with an inclined surface. The inner wall of the second guide plate (304) is attached to the outer wall of the support rod (302). The outer diameter of the second guide plate (304) is larger than the outer diameter of the first guide plate (303).

9. The quick positioning and locking device for microscope objectives according to claim 7, characterized in that: The slot (305) has four sets of openings. The outer wall of the connecting rod (306) is attached to the inner wall of the locking sleeve (1). There are two sets of connecting rods (306). The connecting rods (306) are symmetrically distributed about the central axis of the slot (305).

10. The quick positioning and locking device for microscope objectives according to claim 7, characterized in that: One end of the third return spring (307) is fixedly connected to the connecting rod (306), and the other end of the third return spring (307) is fixedly connected to the locking sleeve (1). The third return spring (307) is used to press the connecting rod (306), and the surface of the limiting block (308) is provided with an inclined surface.

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