Prism switching device for microscope and microscope

Abstract

The utility model relates to a prism switching device for a microscope and the microscope. The prism switching device comprises a base used for being connected to a support of a microscope; a slide rail connected to the base; the sliding piece is connected to the sliding rail and is used for bearing a prism of the microscope; the driving piece is connected to the base and used for driving the sliding piece to slide between a first position and a second position along the sliding rail; and the positioning piece is connected to the base and is used for locking the position of the sliding piece. The positioning piece comprises a rolling part which is in rolling contact with the first side of the sliding piece. A first side of the slider is provided with a first groove and a second groove, the slider is locked in the first position when the rolling portion is fitted in the first groove, and the slider is locked in the second position when the rolling portion is fitted in the second groove. The prism switching device has the advantages that noise is reduced in the prism switching process, movement is smooth, positioning is accurate, assembling and adjusting are convenient, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of microscopes, in particular to a prism switching device for microscopes and a microscope. Background Art

[0002] In the related art, a prism switching device for a microscope includes a sliding member and a slide rail, two prisms are arranged on the sliding member, and one of the two prisms can be selectively moved into the optical path by moving the sliding member along the slide rail.

[0003] At present, the prism switching device usually uses two positioning screws respectively set at the two ends of the sliding member to determine whether the sliding member moves into place. For example, when the sliding member hits one of the positioning screws during the movement of the sliding member, it is determined that one of the prisms moves into the optical path, and when the sliding member hits the other positioning screw, it is determined that the other prism moves into the optical path. Due to the collision, the movement process of the prism switching device is not smooth and noise is generated. Moreover, after long-term use, the wear caused by the collision will reduce the positioning accuracy, so it is necessary to readjust the positioning screws to ensure the positioning accuracy.

[0004] In addition, a stepper motor is usually used in the prism switching device to drive the sliding member to move along the slide rail. Therefore, the step length of the stepper motor and the position setting of the positioning screw need to be coordinated so that the sliding member can just hit the positioning screw when the stepper motor stops. Therefore, the current structure is not convenient for the operator to assemble and adjust. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, an object of the utility model is to provide a prism switching device for a microscope, which has the advantages of reduced noise during the prism switching process, smooth movement, precise positioning, and convenient assembly and adjustment.

[0007] Another object of the present invention is to provide a microscope, which includes the above-mentioned prism switching device.

[0008] According to an embodiment of the first aspect of the utility model, a prism switching device for a microscope is provided. The prism switching device includes: a base, the base is used to be fixedly connected to the support of the microscope; a slide rail, the slide rail is fixedly connected to the base; a sliding member, the sliding member is slidably connected to the slide rail and is used to carry the prism of the microscope; a driving member, the driving member is fixedly connected to the base and is used to drive the sliding member to slide along the slide rail between a first position and a second position; and a positioning member, the positioning member is fixedly connected to the base and is used to lock the position of the sliding member, wherein the positioning member includes a rolling portion, the sliding member has a first side facing the rolling portion, the rolling portion can rollably contact the first side of the sliding member, and wherein the first side of the sliding member is provided with a first groove and a second groove spaced apart in the extension direction of the slide rail, when the rolling portion is engaged in the first groove, the sliding member is locked in the first position, and when the rolling portion is engaged in the second groove, the sliding member is locked in the second position.

[0009] In addition, the prism switching device according to the above embodiment of the utility model may also have the following additional technical features.

[0010] In some embodiments, the positioning member further comprises an elastic portion fixedly connected to the base, the rolling portion is rotatably connected to the elastic portion, and the elastic portion is used to bias the rolling portion onto the first side of the sliding member.

[0011] In some embodiments, the elastic portion is a leaf spring.

[0012] In some embodiments, shapes of the first groove and the second groove match a profile of the rolling portion.

[0013] In some embodiments, the rolling portion is a roller.

[0014] In some embodiments, the prism switching device further includes: a transmission assembly, which is arranged between the driving member and the sliding member, and the driving member transmits power to the sliding member through the transmission assembly to drive the sliding member to slide along the slide rail.

[0015] In some embodiments, the transmission assembly includes: a trigger member, which is fixedly connected to the output end of the driving member, and the trigger member is movable in the extension direction of the slide rail under the drive of the driving member; and a moving member, which is fixedly connected to the sliding member, wherein the trigger member has a first trigger surface and a second trigger surface, and the moving member has a first contact surface and a second contact surface, the first trigger surface and the first contact surface face each other in the extension direction of the slide rail, and the second trigger surface and the second contact surface face each other in the extension direction of the slide rail; when the driving member drives the trigger member to move toward the first position, the first trigger surface and the first contact surface cooperate to drive the sliding member to slide toward the first position; and when the driving member drives the trigger member to move toward the second position, the second trigger surface and the second contact surface cooperate to drive the sliding member to slide toward the second position.

[0016] In some embodiments, in a non-actuated state, a gap is formed between the first trigger surface and the first contact surface, and between the second trigger surface and the second contact surface.

[0017] In some embodiments, the trigger member includes a first part and a second part fixedly connected to the first part, a gap is defined between the first part and the second part in the extension direction of the slide rail, and the moving member is at least partially accommodated in the gap.

[0018] In some embodiments, the first portion, the second portion, and the portion of the moving member accommodated between the gaps are all ring-shaped.

[0019] In some embodiments, the prism switching device further comprises a position sensor fixedly connected to the base and configured to determine a position of the trigger member when the sliding member is located at the first position.

[0020] In some embodiments, the position sensor includes a detection slot and a light emitter and a light receiver arranged face to face in the detection slot; the transmission assembly also includes a protrusion fixedly connected to the trigger member; and when the protrusion moves into the detection slot of the position sensor, it is determined that the trigger member has moved into position.

[0021] In some embodiments, the transmission assembly further comprises: a lead screw connected to an output end of the drive member and oriented parallel to an extension direction of the slide rail, a nut driveably engaged with the lead screw, and the trigger member fixedly connected to the nut.

[0022] According to an embodiment of the second aspect of the utility model, a microscope is provided. The microscope comprises: a bracket; a first prism and a second prism, and a prism switching device according to an embodiment of the first aspect of the utility model. Wherein, the base is fixedly connected to the bracket, the first prism and the second prism are fixedly connected to the sliding member and are spaced apart from each other in the extension direction of the slide rail; and wherein, when the sliding member is locked in the first position, the first prism is located in the optical path of the microscope; and when the sliding member is locked in the second position, the second prism is located in the optical path of the microscope.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features and advantages of the present invention are described below, which explains the present invention in more detail based on embodiments in conjunction with the accompanying drawings.

[0025] Figure 1 It is a stereoscopic diagram of a prism switching device for a microscope according to an embodiment of the utility model.

[0026] Figure 2 It is a bottom view of the prism switching device for a microscope according to an embodiment of the utility model, wherein the base is omitted and the edge of the first groove is moved to the rolling portion.

[0027] Figure 3 It is a bottom view of the prism switching device for a microscope according to an embodiment of the utility model, wherein the base is omitted and the first groove is engaged with the rolling portion.

[0028] Figure 4 It is a bottom view of the prism switching device for a microscope according to an embodiment of the utility model, wherein the base is omitted and the moving member is moved into place.

[0029] Figure 5 It is a bottom view of the prism switching device for a microscope according to an embodiment of the utility model, wherein the base is omitted and the edge of the second groove is moved to the rolling portion.

[0030] Figure 6 It is a bottom view of the prism switching device for a microscope according to an embodiment of the utility model, wherein the base is omitted and the second groove is engaged with the rolling portion.

[0031] Figure 7 It is a bottom view of the prism switching device for a microscope according to an embodiment of the utility model, wherein the base is omitted and the moving member is moved into place. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower", "left", "right", "front", "back" and similar expressions used herein are only for the purpose of illustration and are not intended to limit the present invention.

[0033] like Figures 1 to 7 As shown, the XYZ coordinate system is shown for the convenience of description and direction determination. Among them, the positive direction of the X axis is the left direction, and the negative direction of the X axis is the right direction; the positive direction of the Y axis is the front direction, and the negative direction of the Y axis is the back direction; the positive direction of the Z axis is the top direction, and the negative direction of the Z axis is the bottom direction.

[0034] Reference below Figures 1 to 7 A prism switching device 10 for a microscope 100 and the microscope 100 according to an embodiment of the present invention are described.

[0035] like Figures 1 to 7 As shown, the prism switching device 10 for a microscope 100 according to an embodiment of the utility model comprises: a base 11, the base 11 is used to be fixedly connected to the support of the microscope 100; a slide rail 12, the slide rail 12 is fixedly connected to the base 11; a sliding member 13, the sliding member 13 is slidably connected to the slide rail 12, and is used to carry the prism of the microscope 100; a driving member 14, the driving member 14 is fixedly connected to the base 11, and is used to drive the sliding member 13 to slide along the slide rail 12 between a first position and a second position; and a positioning member 15, the positioning member 15 is fixedly connected to the base 11. The seat 11 is used to lock the position of the sliding member 13, wherein the positioning member 15 includes a rolling portion 153, the sliding member 13 has a first side facing the rolling portion 153, the rolling portion 153 can rollably contact the first side of the sliding member 13, and wherein the first side of the sliding member 13 is provided with a first groove 131 and a second groove 133 spaced apart in the extension direction of the slide rail 12, when the rolling portion 153 is engaged in the first groove 131, the sliding member 13 is locked in the first position, and when the rolling portion 153 is engaged in the second groove 133, the sliding member 13 is locked in the second position.

[0036] In the prism switching device 10 according to the embodiment of the utility model, the first side of the sliding member 13 is provided with a first groove 131 and a second groove 133, the positioning member 15 includes a rolling portion 153 that rollably contacts the first side of the sliding member 13, and when the rolling portion 153 is engaged in the first groove 131, the sliding member 13 is locked in the first position, and when the rolling portion 153 is engaged in the second groove 133, the sliding member 13 is locked in the second position. Therefore, the locking of the position of the sliding member 13 is achieved by the engagement of the rolling portion 153 of the positioning member 15 with the groove of the sliding member 13. Moreover, the rolling portion 153 rolls into the groove along the first side of the sliding member 13, so that the movement process is smooth during the prism switching process and the noise is significantly reduced.

[0037] In some examples, such as Figures 1 to 7 As shown, the rolling portion 153 can be made of rubber. The rubber rolling portion 153 generates less noise during rolling, thereby making the movement process smooth during the prism switching process and significantly reducing noise. It is understandable that the rolling portion 153 can also be made of other materials that generate less noise during rolling, and the utility model is not limited to this.

[0038] In some embodiments, Figures 1 to 7 As shown, the positioning member 15 further includes an elastic portion 151 fixedly connected to the base 11, the rolling portion 153 is rotatably connected to the elastic portion 151, and the elastic portion 151 is used to bias the rolling portion 153 on the first side of the sliding member 13. Therefore, the elastic portion 151 is conducive to quickly pushing the rolling portion 153 into the first groove 131 or the second groove 133, and is conducive to firmly locking the sliding member 13 in the first position or the second position.

[0039] In some embodiments, Figures 1 to 7 As shown, the elastic part 151 is a leaf spring. The leaf spring has a simple structure and is easy to implement. In addition, it can be understood that the leaf spring biases the rolling part 153 toward the sliding member 13, and the elastic deformation direction of the leaf spring is substantially perpendicular to the sliding direction of the sliding member 13, while the leaf spring has a larger stiffness in the non-elastic deformation direction (for example, in the sliding direction of the sliding member 13), so the leaf spring is not easily deformed in the non-elastic deformation direction, thereby locking the position of the sliding member 13 more firmly.

[0040] In some embodiments, Figures 1 to 7As shown, the shapes of the first groove 131 and the second groove 133 match the profile of the rolling portion 153. For example, if the rolling portion 153 is cylindrical, the first groove 131 or the second groove 133 is a part of the cylindrical shape that matches the rolling portion 153; or if the rolling portion 153 is spherical, the first groove 131 or the second groove 133 is a part of the spherical shape that matches the rolling portion 153. The rolling portion 153 matches the profile of the first groove 131 or the second groove 133, so that the rolling portion 153 has a higher concentricity with the first groove 131 or the second groove 133, so that the sliding member 13 can be more accurately positioned at the desired position, that is, the positioning accuracy of the sliding member 13 is improved.

[0041] In some embodiments, Figures 1 to 7 As shown, the rolling part 153 is a roller. The roller structure is simple and easy to implement. It is understandable that the rolling part 153 can also be other structures such as rollers and balls, and the utility model does not limit this.

[0042] In some embodiments, Figures 1 to 7 As shown, the prism switching device 10 further includes: a transmission assembly 16, which is arranged between the driving member 14 and the sliding member 13, and the driving member 14 transmits power to the sliding member 13 through the transmission assembly 16 to drive the sliding member 13 to slide along the slide rail 12. Therefore, the power of the driving member 14 can be transmitted to the sliding member 13 through the transmission assembly 16.

[0043] In some embodiments, Figures 1 to 7As shown, the transmission assembly 16 includes: a trigger member 165, the trigger member 165 is fixedly connected to the output end of the driving member 14, and the trigger member 165 is movable in the extension direction of the slide rail 12 under the drive of the driving member 14; and a moving member 167, the moving member 167 is fixedly connected to the sliding member 13, wherein the trigger member 165 has a first trigger surface 1655 and a second trigger surface 1657, and the moving member 167 has a first contact surface 1675 and a second contact surface 1677, and the first trigger surface 1655 and the first contact surface 1677 are connected to each other. 5 face each other in the extension direction of the slide rail 12, and the second trigger surface 1657 and the second contact surface 1677 face each other in the extension direction of the slide rail 12; when the driving member 14 drives the trigger member 165 to move toward the first position, the first trigger surface 1655 and the first contact surface 1675 cooperate to drive the sliding member 13 to slide toward the first position; and when the driving member 14 drives the trigger member 165 to move toward the second position, the second trigger surface 1657 and the second contact surface 1677 cooperate to drive the sliding member 13 to slide toward the second position. Therefore, the transmission between the trigger member 165 and the moving member 167 is carried out through the contacting first trigger surface 1655 and the first contact surface 1675 or the contacting second trigger surface 1657 and the second contact surface 1677, that is, the trigger member 165 and the moving member 167 are not rigidly connected, which is conducive to achieving the decoupling between the movement of the trigger member 165 and the movement of the moving member 167.

[0044] In some embodiments, Figures 1 to 7 As shown, in the non-driven state, gaps are formed between the first trigger surface 1655 and the first contact surface 1675, and between the second trigger surface 1657 and the second contact surface 1677. It can be understood that the non-driven state refers to the state in which the driving member 14 stops driving, for example, when the sliding member 13 is locked in the first position or the second position. In the non-driven state, gaps are formed between the first trigger surface 1655 and the first contact surface 1675, and between the second trigger surface 1657 and the second contact surface 1677, the trigger member 165 does not contact the moving member 167, and the driving member 14 does not apply any undesirable force to the sliding member 13, so the driving member 14 does not affect the precise positioning of the sliding member 13.

[0045] It can also be understood that when the trigger member 165 drives the moving member 167 to move, and the edge of the first groove 131 or the second groove 133 of the sliding member 13 contacts the rolling portion 153, under the pressure of the elastic portion 151, the rolling portion 153 will suddenly jump into the first groove 131 or the second groove 133, which will cause the moving member 167 to be offset in the driving direction relative to the trigger member 165, that is, the moving member 167 will disengage from the trigger member 165 and lead the trigger member 165 by a certain distance.

[0046] In order to prevent the offset from causing an uneven movement or generating noise, in a non-driven state, the sum of the gap between the first trigger surface 1655 and the first contact surface 1675 and the gap between the second trigger surface 1657 and the second contact surface 1677 is greater than the offset.

[0047] For example, when the trigger member 165 drives the moving member 167 to move toward the first position, the first trigger surface 1655 contacts the first contact surface 1675, and the distance between the second trigger surface 1657 and the second contact surface 1677 is equal to the sum of the gap between the first trigger surface 1655 and the first contact surface 1675 and the gap between the second trigger surface 1657 and the second contact surface 1677 in the non-actuated state. In the non-actuated state, the sum of the gap between the first trigger surface 1655 and the first contact surface 1675 and the gap between the second trigger surface 1657 and the second contact surface 1677 is greater than the offset. Therefore, in the above-mentioned driving state, the distance between the second trigger surface 1657 and the second contact surface 1677 is greater than the offset, so that when the above-mentioned offset occurs, the first trigger surface 1655 is separated from the first contact surface 1675, and the second trigger surface 1657 is close to the second contact surface 1677 but does not contact, thereby avoiding a sudden offset that causes the second trigger surface 1657 to collide with the second contact surface 1677 to generate noise and make the movement process uneven.

[0048] On the contrary, when the trigger member 165 drives the moving member 167 to move toward the second position, the second trigger surface 1657 contacts the second contact surface 1677, and the distance between the first trigger surface 1655 and the first contact surface 1675 is equal to the sum of the gap between the first trigger surface 1655 and the first contact surface 1675 and the gap between the second trigger surface 1657 and the second contact surface 1677 in the non-driven state. In the non-driven state, the sum of the gap between the first trigger surface 1655 and the first contact surface 1675 and the gap between the second trigger surface 1657 and the second contact surface 1677 is greater than the offset. Therefore, in the above-mentioned driving state, the distance between the first trigger surface 1655 and the first contact surface 1675 is greater than the offset, so that when the above-mentioned offset occurs, the second trigger surface 1657 is separated from the second contact surface 1677, and the first trigger surface 1655 is close to the first contact surface 1675 but does not contact it, thereby avoiding a sudden offset that causes the first trigger surface 1655 to collide with the first contact surface 1675 to generate noise and make the movement process uneven.

[0049] In some embodiments, Figures 1 to 7As shown, the trigger member 165 includes a first portion 1651 and a second portion 1653 fixedly connected to the first portion 1651. In the extension direction of the slide rail 12, a gap is defined between the first portion 1651 and the second portion 1653, and the moving member 167 is at least partially accommodated in the gap. Therefore, the trigger member 165 surrounds the moving member 167, and the moving member 167 and the trigger member 165 can be spaced apart in the extension direction of the slide rail 12.

[0050] In other embodiments, the moving member 167 may include a first portion 1651 and a second portion 1653 fixedly connected to the first portion 1651, and a gap is defined between the first portion 1651 and the second portion 1653 in the extending direction of the slide rail 12, and the trigger member 165 is at least partially accommodated in the gap. Therefore, the moving member 167 surrounds the trigger member 165, and the moving member 167 and the trigger member 165 may be spaced apart in the extending direction of the slide rail 12.

[0051] In some embodiments, Figures 1 to 7 As shown, the first part 1651, the second part 1653, and the part of the moving member 167 contained in the gap are all annular. Therefore, the contact area between the trigger member 165 and the moving member 167 is large, and the stress between the trigger member 165 and the moving member 167 is small, which is conducive to reducing noise and reducing the strength requirements of the trigger member 165 and the moving member 167.

[0052] In other embodiments, the first portion 1651 , the second portion 1653 , and the portion of the trigger member 165 received in the gap are all ring-shaped.

[0053] In some embodiments, Figures 1 to 7 As shown, the prism switching device 10 further includes a position sensor 17, which is fixedly connected to the base 11 and is used to determine the position of the trigger member 165 when the sliding member 13 is in the first position. The trigger member 165 is fixedly connected to the driving member 14, so the position of the driving member 14 can be determined by determining the position of the trigger member 165 through the position sensor 17.

[0054] It is understandable that when the trigger member 165 drives the moving member 167 to move toward the first position, the first trigger surface 1655 contacts the first contact surface 1675, and the distance between the second trigger surface 1657 and the second contact surface 1677 is equal to the sum of the gap between the first trigger surface 1655 and the first contact surface 1675 and the gap between the second trigger surface 1657 and the second contact surface 1677 in the non-driven state. When the above-mentioned offset occurs in the above-mentioned driven state, the first trigger surface 1655 is separated from the first contact surface 1675, and the second trigger surface 1657 is close to the second contact surface 1677 but does not contact. The driving member 14 can drive the trigger member 165 to continue to move, so that the gap between the first trigger surface 1655 and the second contact surface 1677 is substantially consistent with the interval between the second trigger surface 1657 and the second contact surface 1677, so as to avoid the accidental movement of the trigger member 165 from affecting the moving member 167, that is, to avoid the accidental movement of the driving member 14 from affecting the sliding member 13.

[0055] It can also be understood that after the position sensor 17 detects that the trigger member 165 has moved into position, it will control the driving member 14 to stop driving, thereby determining the position of the driving member 14, which can be used as the initial position when the driving member 14 drives the trigger member 165 to move toward the second position. The distance between the first groove 131 and the second groove 133 is determined, so the position of the trigger member 165 from the initial position to the position when the sliding member 13 enters the second position can be determined, so that the step length and other parameters of the driving member 14 can be set by calculation, so that when the sliding member 13 enters the second position, the driving member 14 stops driving without setting another position sensor 17 to detect the position of the trigger member 165.

[0056] That is, according to the embodiment of the utility model, when moving toward the first position, it is necessary to detect the position of the trigger member 165, but when moving toward the second position, it is not necessary to detect the position of the trigger member 165. While ensuring the positioning accuracy, only one position sensor 17 needs to be provided, which simplifies the structure and reduces the cost. Therefore, the assembly and adjustment of the device are facilitated.

[0057] In some embodiments, Figures 1 to 7 As shown, the position sensor 17 includes a detection slot 171 and a light emitter and a light receiver arranged face to face in the detection slot 171; the transmission assembly 16 also includes a lug 169 fixedly connected to the trigger member 165; and when the lug 169 moves into the detection slot 171 of the position sensor 17, it is determined that the trigger member 165 moves into position. Therefore, when the lug 169 connected to the trigger member 165 moves into the detection slot 171, it can be determined that the trigger member 165 moves into position, and the driving member 14 is controlled to stop driving.

[0058] In some embodiments, Figures 1 to 7As shown, the transmission assembly 16 further includes: a lead screw 161, which is connected to the output end of the driving member 14 and is oriented parallel to the extension direction of the slide rail 12, a nut 163, which is drivably matched to the lead screw 161, and a trigger member 165 is fixedly connected to the nut 163. Therefore, the power of the driving member 14 can be transmitted to the trigger member 165 through the lead screw 161 nut 163 mechanism. It can be understood that in this case, the driving member 14 can be a rotary electric motor, and the rotary motion of the electric motor is converted into the linear movement of the nut 163 along the lead screw 161 through the lead screw 161 nut 163 mechanism, and the nut 163 further drives the trigger member 165 to move linearly.

[0059] In other embodiments, the transmission assembly 16 may further include a gear and a rack. The gear is connected to the output end of the driving member 14, the rack is oriented parallel to the extension direction of the slide rail 12, the gear is transmissionably matched to the rack, and the trigger member 165 is fixedly connected to the rack. Therefore, the power of the driving member 14 can be transmitted to the trigger member 165 through the gear and rack structure.

[0060] like Figures 1 to 7 As shown, the microscope 100 according to the embodiment of the utility model comprises: a bracket; a first prism 20 and a second prism 30, and a prism switching device 10 according to the above embodiment of the utility model. The base 11 is fixedly connected to the bracket, the first prism 20 and the second prism 30 are fixedly connected to the sliding member 13 and are spaced apart from each other in the extension direction of the slide rail 12; when the sliding member 13 is locked in the first position, the first prism 20 is located in the optical path of the microscope 100; and when the sliding member 13 is locked in the second position, the second prism 30 is located in the optical path of the microscope 100.

[0061] The microscope 100 according to the embodiment of the present invention includes the prism switching device 10 of the above embodiment and has the same beneficial effects as the above prism switching device 10 , which will not be described again.

[0062] Reference below Figures 1 to 7 A prism switching device 10 for a microscope 100 and the microscope 100 according to a specific embodiment of the present invention are described.

[0063] Figure 1 1 is a perspective view of a prism switching device for a microscope according to an embodiment of the utility model. Figure 1 As shown, the prism switching device 10 for a microscope 100 according to a specific embodiment of the present utility model includes: a base 11, a slide rail 12, a sliding member 13, a driving member 14 and a positioning member 15.

[0064] The base 11 is substantially plate-shaped and is used to be fixedly connected to a support of the microscope 100 .

[0065] The slide rail 12 is substantially in a long strip shape and is fixedly connected to the base 11 .

[0066] The sliding member 13 is substantially plate-shaped and is slidably connected to the slide rail 12 and is used to carry the prism of the microscope 100 .

[0067] The driving member 14 is fixedly connected to the base 11 and is used to drive the sliding member 13 to slide between the first position and the second position along the slide rail 12. In a specific embodiment of the present utility model, the driving member 14 can be an electric motor, such as a stepping electric motor.

[0068] The positioning member 15 includes an elastic portion 151 fixedly connected to the base 11 and a rolling portion 153 rotatably connected to the elastic portion 151. In a specific embodiment of the utility model, the elastic portion 151 is a leaf spring, and the rolling portion 153 is a roller. For example, the leaf spring is fixedly connected to the base 11 by bolts; the rolling portion 153 is rotatably connected to the end of the leaf spring close to the sliding member 13 by a pin shaft perpendicular to the sliding direction of the sliding member 13.

[0069] The sliding member 13 has a first side (eg, Figure 1 The roller 153 is shown in the lower side of the slide 13, and the rolling portion 153 can rollably contact the first side of the slide 13. The first side of the slide 13 is provided with a first groove 131 and a second groove 133 spaced apart in the extension direction of the slide rail 12. When the rolling portion 153 is engaged in the first groove 131, the slide 13 is locked in the first position, and when the rolling portion 153 is engaged in the second groove 133, the slide 13 is locked in the second position. In a specific embodiment of the utility model, the roller is substantially cylindrical, and the first groove 131 and the second groove 133 are substantially a part of a cylinder matching the shape of the roller.

[0070] The prism switching device 10 further includes a transmission assembly 16, which is arranged between the driving member 14 and the sliding member 13. The driving member 14 transmits power to the sliding member 13 through the transmission assembly 16, so as to drive the sliding member 13 to slide along the slide rail 12.

[0071] The transmission assembly 16 includes a lead screw 161, a nut 163, a trigger member 165 and a moving member 167. The lead screw 161 is connected to the output end of the driving member 14 and is oriented parallel to the extension direction of the slide rail 12. The nut 163 is drivably fitted to the lead screw 161, and the trigger member 165 is fixedly connected to the nut 163. The trigger member 165 is movable in the extension direction of the slide rail 12 under the drive of the driving member 14. The moving member 167 is fixedly connected to the sliding member 13.

[0072] The trigger member 165 includes a first portion 1651 and a second portion 1653 fixedly connected to the first portion 1651. In the extension direction of the slide rail 12, a gap is defined between the first portion 1651 and the second portion 1653, and the moving member 167 is at least partially accommodated in the gap. The first portion 1651, the second portion 1653, and the portion of the moving member 167 accommodated between the gap are all annular. The first portion 1651 is fixedly connected to the side of the nut 163 away from the driving member 14. The first portion 1651 and the second portion 1653 are fixedly connected by bolts.

[0073] The moving member 167 includes a connecting portion 1672 fixedly connected to the sliding member 13 and a contact portion 1671 located between the first portion 1651 and the second portion 1653 of the trigger member 165. For example, the connecting portion 1672 is fixedly connected to the sliding member 13 by bolts. It can be understood that the annular first portion 1651, the second portion 1653 and the contact portion 1671 can avoid interference with the lead screw 161, so that the moving process is smooth.

[0074] The first portion 1651 of the trigger member 165 has a first trigger surface 1655 , the second portion 1653 of the trigger member 165 has a second trigger surface 1657 , and the first trigger surface 1655 and the second trigger surface 1657 face each other.

[0075] The moving member 167 has a first contact surface 1675 and a second contact surface 1677 which are away from each other. The first contact surface 1675 and the second contact surface 1677 are located in the gap between the first portion 1651 and the second portion 1653. The first trigger surface 1655 and the first contact surface 1675 face each other in the extension direction of the slide rail 12, and the second trigger surface 1657 and the second contact surface 1677 face each other in the extension direction of the slide rail 12. When the driving member 14 drives the trigger member 165 to move toward the first position, the first trigger surface 1655 and the first contact surface 1675 cooperate to drive the sliding member 13 to slide toward the first position; and when the driving member 14 drives the trigger member 165 to move toward the second position, the second trigger surface 1657 and the second contact surface 1677 cooperate to drive the sliding member 13 to slide toward the second position.

[0076] In the non-actuated state, substantially equal gaps are formed between the first trigger surface 1655 and the first contact surface 1675 , and between the second trigger surface 1657 and the second contact surface 1677 .

[0077] It should be noted that the sum of the gap between the first trigger surface 1655 and the first contact surface 1675 and the gap between the second trigger surface 1657 and the second contact surface 1677 may be greater than the radius of the first groove 131 or the second groove 133 .

[0078] It can be understood that the distance that the rolling portion 153 moves from the edge of the first groove 131 or the second groove 133 into the first groove 131 or the second groove 133 is less than or equal to the radius of the first groove 131 or the second groove 133. Therefore, in the driving state, the first trigger surface 1655 contacts the first contact surface 1675, and when the rolling portion 153 jumps into the first groove 131, the distance that the first contact surface 1675 deviates from the first trigger surface 1655 is equal to the distance that the rolling portion 153 moves from the edge of the first groove 131 or the second groove 133 into the first groove 131 or the second groove 133, that is, less than or equal to the radius of the first groove 131 or the second groove 133. Therefore, the sum of the gap between the first trigger surface 1655 and the first contact surface 1675 and the gap between the second trigger surface 1657 and the second contact surface 1677 can be greater than the radius of the first groove 131 or the second groove 133, which can ensure that when the rolling portion 153 jumps into the first groove 131, the first contact surface 1675 deviates from the first trigger surface 1655, but the second contact surface 1677 does not contact the second trigger surface 1657, thereby avoiding an uneven movement process and avoiding noise. In the driving state, the second trigger surface 1657 and the second contact surface 1677 contact similarly, so it will not be described again.

[0079] The prism switching device 10 further includes a position sensor 17 , which is fixedly connected to the base 11 and is used to determine the position of the trigger member 165 when the sliding member 13 is located at the first position.

[0080] The position sensor 17 includes a detection slot 171 and a light emitter and a light receiver arranged face to face in the detection slot 171; the transmission assembly 16 also includes a lug 169 fixedly connected to the trigger member 165; and when the lug 169 moves into the detection slot 171 of the position sensor 17, it is determined that the trigger member 165 moves into position. In a specific embodiment of the utility model, the lug 169 is fixedly connected to the second part 1653 of the trigger member 165.

[0081] like Figure 1 As shown, the microscope 100 according to a specific embodiment of the utility model comprises a bracket, a first prism 20 and a second prism 30, and a prism switching device 10 according to the above specific embodiment. The base 11 is fixedly connected to the bracket, the first prism 20 and the second prism 30 are fixedly connected to the sliding member 13 and are spaced apart from each other in the extension direction of the slide rail 12; and when the sliding member 13 is locked in the first position, the first prism 20 is located in the optical path of the microscope 100; and when the sliding member 13 is locked in the second position, the second prism 30 is located in the optical path of the microscope 100.

[0082] Reference below Figures 2 to 7The working process of the prism switching device 10 and the microscope 100 according to the specific embodiment of the utility model is briefly described.

[0083] Figure 2 1 is a bottom view of the prism switching device 10 for the microscope 100 according to an embodiment of the utility model, in which the base 11 is omitted, and the edge of the first groove 131 moves to the rolling portion 153. When the driving member 14 rotates in the first direction, the lead screw 161 drives the nut 163 to move rightward, and the nut 163 drives the trigger member 165 to move rightward. The first trigger surface 1655 of the trigger member 165 contacts the first contact surface 1675 of the moving member 167, and the trigger member 165 drives the moving member 167 to move rightward through the contacted first trigger surface 1655 and the first contact surface 1675; the moving member 167 drives the sliding member 13 to move rightward. The first groove 131 moves toward the rolling portion 153 of the positioning member 15 until the edge of the first groove 131 moves to the rolling portion 153.

[0084] Figure 3 1 is a bottom view of the prism switching device 10 for the microscope 100 according to an embodiment of the utility model, wherein the base 11 is omitted, and the first groove 131 is engaged with the rolling portion 153. When the edge of the first groove 131 moves to the rolling portion 153, under the pressure of the elastic portion 151 of the positioning member 15, the rolling portion 153 suddenly jumps into the first groove 131, driving the sliding member 13 to suddenly move to the right, so that the first contact surface 1675 of the moving member 167 is out of contact with the first triggering surface 1655 of the triggering member 165, and the second contact surface 1677 of the moving member 167 is close to but not in contact with the second triggering surface 1657 of the triggering member 165.

[0085] Figure 4 1 is a bottom view of the prism switching device 10 for the microscope 100 according to the embodiment of the utility model, wherein the base 11 is omitted and the moving member 167 is moved into position. The trigger member 165 continues to move to the right, and the lug 169 moves into the detection slot 171 of the position sensor 17. The position sensor 17 determines that the trigger member 165 is moved into position, and the driving member 14 stops driving, so that the gap between the first contact surface 1675 and the first trigger surface 1655 is substantially equal to the gap between the second contact surface 1677 and the second trigger surface 1657.

[0086] Figure 51 is a bottom view of the prism switching device 10 for the microscope 100 according to an embodiment of the utility model, wherein the base 11 is omitted, and the edge of the second groove 133 moves to the rolling portion 153. When the driving member 14 rotates in the second direction, the lead screw 161 drives the nut 163 to move to the left, and the nut 163 drives the trigger member 165 to move to the left. The second trigger surface 1657 of the trigger member 165 contacts the second contact surface 1677 of the moving member 167, and the trigger member 165 drives the moving member 167 to move to the left through the contacted second trigger surface 1657 and the second contact surface 1677; the moving member 167 drives the sliding member 13 to move to the left. The rolling portion 153 of the positioning member 15 is ejected from the first groove 131 of the sliding member 13, and the second groove 133 of the sliding member 13 moves toward the rolling portion 153 of the positioning member 15 until the edge of the second groove 133 moves to the rolling portion 153.

[0087] Figure 6 1 is a bottom view of the prism switching device 10 for the microscope 100 according to an embodiment of the utility model, wherein the base 11 is omitted, and the second groove 133 is engaged with the rolling portion 153. When the edge of the second groove 133 moves to the rolling portion 153, under the pressure of the elastic portion 151 of the positioning member 15, the rolling portion 153 suddenly jumps into the second groove 133, driving the sliding member 13 to suddenly move to the left, so that the second contact surface 1677 of the moving member 167 is out of contact with the second triggering surface 1657 of the triggering member 165, and the first contact surface 1675 of the moving member 167 is close to but not in contact with the first triggering surface 1655 of the triggering member 165.

[0088] Figure 7 1 is a bottom view of the prism switching device 10 for the microscope 100 according to an embodiment of the utility model, wherein the base 11 is omitted and the moving member 167 is moved into position. The trigger member 165 continues to move to the left, and the driving member 14 stops driving, so that the gap between the first contact surface 1675 and the first trigger surface 1655 is substantially equal to the gap between the second contact surface 1677 and the second trigger surface 1657.

[0089] It should be noted that, when moving toward the second position of the sliding member 13, since the initial position of the trigger member 165 determined by the position sensor 17 is known, the distance between the first groove 131 and the second groove 133 is known. Therefore, by setting parameters such as the step length of the driving member 14, the driving member 14 can stop when the gap between the first contact surface 1675 and the first trigger surface 1655 is substantially equal to the gap between the second contact surface 1677 and the second trigger surface 1657, without the need to set another position sensor 17 at the second position.

[0090] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0091] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0094] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A prism switching device for a microscope, characterized in that: The prism switching device comprises: a base, the base being used to be fixedly connected to a support of the microscope; a slide rail fixedly connected to the base; a sliding member slidably connected to the slide rail and used for carrying a prism of the microscope; a driving member fixedly connected to the base and used for driving the sliding member to slide along the slide rail between a first position and a second position; and a positioning member, the positioning member being fixedly connected to the base and used to lock the position of the sliding member, The positioning member includes a rolling portion, the sliding member has a first side facing the rolling portion, the rolling portion can rollably contact the first side of the sliding member, and In which, a first groove and a second groove spaced apart in the extension direction of the slide rail are provided on the first side of the sliding member, and when the rolling portion is engaged in the first groove, the sliding member is locked in the first position, and when the rolling portion is engaged in the second groove, the sliding member is locked in the second position.

2. The prism switching device for a microscope according to claim 1, characterized in that: The positioning member further includes an elastic portion fixedly connected to the base, the rolling portion is rotatably connected to the elastic portion, and the elastic portion is used to bias the rolling portion onto the first side of the sliding member.

3. The prism switching device for a microscope according to claim 2, characterized in that: The elastic part is a leaf spring.

4. The prism switching device for a microscope according to any one of claims 1 to 3, characterized in that: The shapes of the first groove and the second groove match the contour of the rolling portion.

5. The prism switching device for a microscope according to any one of claims 1 to 3, characterized in that: The rolling part is a roller.

6. The prism switching device for a microscope according to any one of claims 1 to 3, characterized in that: The prism switching device also includes: A transmission assembly is arranged between the driving member and the sliding member, and the driving member transmits power to the sliding member through the transmission assembly to drive the sliding member to slide along the slide rail.

7. The prism switching device for a microscope according to claim 6, characterized in that: The transmission assembly comprises: a triggering member, the triggering member being fixedly connected to an output end of the driving member and being movable in an extending direction of the slide rail under the driving of the driving member; and a moving member fixedly connected to the sliding member, In which, the trigger member has a first trigger surface and a second trigger surface, and the moving member has a first contact surface and a second contact surface, the first trigger surface and the first contact surface face each other in the extension direction of the slide rail, and the second trigger surface and the second contact surface face each other in the extension direction of the slide rail; when the driving member drives the trigger member to move toward the first position, the first trigger surface and the first contact surface cooperate to drive the sliding member to slide toward the first position; and when the driving member drives the trigger member to move toward the second position, the second trigger surface and the second contact surface cooperate to drive the sliding member to slide toward the second position.

8. The prism switching device for a microscope according to claim 7, characterized in that: In a non-driving state, gaps are formed between the first triggering surface and the first contact surface, and between the second triggering surface and the second contact surface.

9. The prism switching device for a microscope according to claim 7, characterized in that: The trigger member includes a first portion and a second portion fixedly connected to the first portion, a gap is defined between the first portion and the second portion in the extending direction of the slide rail, and the moving member is at least partially accommodated in the gap.

10. The prism switching device for a microscope according to claim 9, characterized in that: The first portion, the second portion, and the portion of the moving member accommodated between the gaps are all ring-shaped.

11. The prism switching device for a microscope according to claim 7, characterized in that: The prism switching device further includes a position sensor, which is fixedly connected to the base and is used to determine the position of the trigger member when the sliding member is located at the first position.

12. The prism switching device for a microscope according to claim 11, characterized in that: The position sensor includes a detection slot and a light emitter and a light receiver arranged face to face in the detection slot; the transmission assembly also includes a lug fixedly connected to the trigger member; and when the lug moves into the detection slot of the position sensor, it is determined that the trigger member has moved into position.

13. The prism switching device for a microscope according to claim 7, characterized in that: The transmission assembly also includes: a lead screw connected to an output end of the drive member and oriented parallel to the extension direction of the slide rail, A nut is drivably engaged to the lead screw, and the trigger member is fixedly connected to the nut.

14. A microscope, characterized in that: The microscope comprises: Bracket; a first prism and a second prism, and The prism switching device according to any one of claims 1 to 13, in, The base is fixedly connected to the bracket, and the first prism and the second prism are fixedly connected to the sliding member and are spaced apart from each other in the extending direction of the slide rail; and wherein, when the sliding member is locked in the first position, the first prism is located in the optical path of the microscope; And when the slide is locked in the second position, the second prism is located in the optical path of the microscope.

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