Probe switching mechanism and optical measuring device

Abstract

The utility model discloses a probe switching mechanism and an optical measuring device, and the probe switching mechanism is arranged in a housing of the optical measuring device, and comprises a rotating plate, more than two probes, a cam, an actuating member, a driven member, a rotating shaft, and a driving member. The rotating plate is fixedly connected with a rotating shaft which is further fixedly connected with a driven piece. Each probe comprises a probe body and an extension part, and each probe is vertically mounted on the periphery of the rotating plate through an elastic limiting structure, so that the probe can linearly move in the direction away from or close to the rotating shaft in the radial direction of the rotating plate; the driving piece is used for driving the cam to rotate, the cam is located between the extending part and the driven piece, the cam comprises a protruding part, and an actuating piece is arranged on the protruding part. The probe switching mechanism disclosed by the utility model is more simplified, high in transmission precision, easy to control and high in safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical measurement field especially, be a kind of probe switching mechanism and optical measuring device. BACKGROUND

[0002] Probe switching mechanism is for switching different probe mechanism arranged in the optical measuring device shell inside biological measuring instrument or optical tomography, different probe has different measurement function, for example, one can be biological measurement probe, one can be OCT probe, after probe switching, to realize different measurement function, optical path also needs to be switched simultaneously, for example, insert different lens in optical path etc..But the existing probe switching mechanism mechanism is complex, transmission precision is low, not easy to control. UTILITY MODEL CONTENT

[0003] The utility model is to solve the problem of improving the transmission precision of probe switching mechanism, provide a kind of probe switching mechanism and optical measuring device.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of probe switching mechanism, arranged in the shell inside optical measuring device, it include: rotating plate, two above-mentioned probe, cam, actuator, driven part, rotating shaft, driving part;

[0006] The rotating plate is fixedly connected with the rotating shaft, and the rotating shaft is also fixedly connected with the driven part;

[0007] The probe includes probe body and extension, each probe is vertically installed on the outer periphery of the rotating plate by elastic limiting structure, so that the probe can move linearly away from or close to the rotating shaft along the radial direction of the rotating plate;

[0008] The driving part is used to drive the cam rotation, and the cam is located between the extension and the driven part, the cam includes protruding part, and the actuator is arranged on the protruding part;

[0009] The actuator can be rotated to the driven part along with the cam, drive the driven part to rotate, so as to drive the rotating plate to rotate, so that the target probe rotates around the rotating shaft to the first target position and stops;

[0010] The protruding part can be rotated away from or close to the extension, so that the switched probe is reset to the outer periphery of the rotating plate under the action of the elastic force of the elastic limiting structure or the extension is moved to the second target position at the forefront relative to the radial direction of the rotating plate, so that the target probe is attached to the shell of the optical measuring device.

[0011] In some embodiments, the outer edge of the rotating plate is fan-shaped or circular.

[0012] In some embodiments, the elastic limiting structure comprises a guide rail, a sliding plate and a spring, the guide rail is fixedly installed on the rotating plate along the radial direction of the rotating plate, the guide rail is provided with a groove extending in the length direction, the sliding plate is in sliding connection with the guide rail, the first end of the sliding plate is fixedly connected with the probe, the second end of the sliding plate is provided with a baffle, and the spring is arranged in the groove of the guide rail, the first end of the spring is fixedly installed on the guide rail, and the second end of the spring abuts against the baffle.

[0013] In some embodiments, the actuating member is a shift fork, the driven member is a slot wheel capable of rotary indexing, the slot wheel is provided with a radial slot capable of accommodating the shift fork, the shift fork can drive the slot wheel to rotate when the shift fork is in the slot, the outer edge of the slot wheel is provided with an inner recessed locking arc, the cam is provided with a locking portion, the locking portion has an outer convex locking arc capable of cooperating with the shape of the inner recessed locking arc, so that the slot wheel stops moving when the shift fork is not in the slot.

[0014] In some embodiments, the slot wheel is provided with an inner recessed locking arc matched with the number of probes.

[0015] In some embodiments, a first sensor, a second sensor and an induction sheet are further included, the induction sheet is fixedly installed on the rotating plate, the number of probes is three, the induction sheet is coupled with the first sensor when the probe is located at the initial position of switching, and the induction sheet is coupled with the second sensor when the probe is located at the end position of switching.

[0016] In some embodiments, the driving member is a driving stepper motor.

[0017] The utility model also provides a kind of optical measuring device, including shell and the probe switching mechanism as described above being set in the shell.

[0018] The utility model has the following beneficial effects:

[0019] The utility model discloses a rotating plate, cam, actuating member, driven member, rotating shaft, the structure of driving member is arranged, can make target probe accurate and fast rotation to first target position and stop, then extend relative rotating plate radial and move to the second target position of the most front end, make target probe adhere to the optical measuring device shell, when needing to switch other lens, be switched probe resets.The probe switching mechanism of the utility model is more simplified, transmission precision is high, control is easy, and safety is high. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1is a structure schematic view of the probe switching mechanism in the embodiment of the utility model;

[0021] Figure 2 is a structure schematic view of the probe switching mechanism in another view in the embodiment of the utility model;

[0022] Figure 3 is a position structure schematic view of the groove wheel, cam and probe in the embodiment of the utility model;

[0023] Figure 4 is a structure schematic view of the groove wheel and cam in another view in the embodiment of the utility model;

[0024] Figure 5 is a structure schematic view of the elastic limiting structure in the embodiment of the utility model;

[0025] Figure 6 is a position schematic view of the sensor and sensing sheet in the embodiment of the utility model;

[0026] Figure 7 is a structure schematic view of each probe in the initial position in the embodiment of the utility model;

[0027] Figure 8 is a position state schematic view of the cam and groove wheel at a moment when the probe switches in the embodiment of the utility model;

[0028] Figure 9 is a structure schematic view of the groove wheel and locking part in the embodiment of the utility model;

[0029] Figure 10 is a schematic view of the second probe in the second target position in the embodiment of the utility model;

[0030] Explanation of reference signs:

[0031] 1, rotating plate; 2, probe; 21, probe body; 22, extension; 23, first probe; 24, second probe; 25, third probe; 3, cam; 31, locking part; 32, protruding part; 4, shift fork; 5, groove wheel; 6, rotating shaft; 7, driving step motor; 8, elastic limiting structure; 81, guide rail; 82, sliding plate; 821, baffle; 83, spring; 91, sensing sheet; 92, first sensor, 93, second sensor. Specific implementation

[0032] The following will make detailed description to the implementation of the utility model. It should be emphasized that the following description is only exemplary, and is not intended to limit the scope of the utility model and its application.

[0033] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will also be understood that, when a device or element is referred to as being "coupled" to another device or element, electrical or mechanical communication can be established therethrough.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are used for convenience of description and simplification of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0035] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the embodiments of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0036] Reference Figures 1-5 The utility model embodiment provides a kind of probe switching mechanism, be arranged in the optical measuring device shell interior, it include: rotary plate 1, two above probe 2, cam 3, actuating member, driven member, rotating shaft 6, driving element;

[0037] Rotary plate 1 is fixedly connected rotating shaft 6, and rotating shaft 6 is also fixedly connected driven member;

[0038] Probe 2 includes probe body 21 and extension 22, each probe 2 is vertically installed on the outer periphery of rotary plate 1 by elastic limiting structure 8, so that probe 2 can move linearly in the radial direction of rotary plate 1 away from or close to rotating shaft 6 when stressed.

[0039] Driving element is used to drive cam 3 to rotate, and cam 3 is located between extension 22 and driven member, and cam 3 includes protruding part 32, and actuating member is arranged on protruding part 32;

[0040] When probe switching mechanism is in the first movement state, protruding part 32 rotates away from extension 22, and the switched probe is reset to the outer periphery of rotary plate 1 due to the elastic force of elastic limiting structure 8;

[0041] The actuating member can rotate with the cam 3 to the driven member, drive the driven member to rotate, and thus drive the rotating plate 1 to rotate, so that the target probe rotates around the rotating shaft 6 to the first target position and then stops;

[0042] The protruding part 32 can rotate away from or close to the extending part 22, so that the switched probe is reset to the outer periphery of the rotating plate 1 or the extending part 22 is moved to the second target position at the most front end of the rotating plate 1 in the radial direction under the elastic force of the elastic limiting structure 8, so that the target probe is attached to the shell of the optical measuring device.

[0043] Specifically, in the embodiment, the driving member is a driving stepper motor 7, the number of probes 2 in the embodiment is three, and the embodiment is only one specific embodiment, and the number of probes 2 can be set according to actual conditions. The outer edge of the rotating plate 1 in the embodiment is fan-shaped, and in other embodiments, the outer edge of the rotating plate 1 can also be circular. In the embodiment, the elastic limiting structure 8 includes a guide rail 81, a sliding plate 82, and a spring 83. The guide rail 81 is fixedly installed on the rotating plate 1 in the radial direction of the rotating plate 1. The guide rail 81 is provided with a groove extending in the length direction. The sliding plate 82 is in sliding connection with the guide rail 81. The first end of the sliding plate 82 is fixedly connected with the probe 2. The second end of the sliding plate 82 is provided with a baffle 821. The spring 83 is arranged in the groove of the guide rail 81. The first end of the spring 83 is fixedly installed on the guide rail 81. The second end of the spring 83 abuts against the baffle 821.

[0044] In the embodiment, the actuating member of the mechanical transmission part is a shift fork 4, and the driven member is a slot wheel 5 capable of rotating and indexing. The slot wheel 5 is arranged below the rotating plate 1 and is fixed on the rotating shaft 6. The rotating plate 1 is provided with a cam 3 below the outer edge. The cam 3 is located between the slot wheel 5 and the extending part 22 and can abut against the extending part 22 of the first probe 23, the first probe 24, or the third probe 2. The cam 3 is provided with the shift fork 4. The slot wheel 5 is provided with a radial groove capable of accommodating the shift fork 4, so that when the shift fork 4 rotates in the groove, the slot wheel 5 can be driven to rotate. The outer edge of the slot wheel 5 is provided with an inner concave locking arc. The cam 3 is provided with a locking part 31 having an outer convex locking arc capable of cooperating with the inner concave locking arc, so that when the shift fork 4 is not in the groove, the slot wheel 5 stops moving. In the embodiment, the slot wheel 5 is also provided with an inner concave locking arc matched with the number of probes 2.

[0045] Reference Figure 6The probe switching mechanism in one of the embodiments further comprises a first sensor 92, a second sensor 93 and an inductive sheet 91 fixedly installed on the rotating plate 1, wherein the sensors are photoelectric sensors in this embodiment and serve as position information feedback control, after the motor is started, the sensors are used to find the position of the probes according to a predetermined program and switch the position of the probes, the probes are three, namely a first probe 23, a second probe 24 and a third probe 25, when the probes are located at the initial position of switching, the inductive sheet 91 is coupled with the first sensor 92, and when the probes are located at the end position of switching, the inductive sheet 91 is coupled with the second sensor 93.

[0046] The utility model also provides a kind of optical measuring device, including shell and the probe switching mechanism as described above in shell.

[0047] Reference Figures 7-10 , the switching process of two probes of the probe switching mechanism in the embodiment is taken as an example to describe the switching process as follows:

[0048] After the equipment is powered on, the motor is started, and each part is reset, at this time, each probe is located at the initial position of switching, the inductive sheet 91 is located at the position of the first sensor 92 and is coupled with the first sensor 92, at this time, the first probe 23 is located at the foremost position (second target position) and is attached to the shell of the biological measuring instrument or optical tomography instrument, the state of the cam 3 is as shown in Figure 7 , the spring 83 is in a stretched state due to the support of the cam 3 at this time.

[0049] After receiving the switching instruction, the program sends a pulse number instruction to drive the stepper motor 7 to drive the cam 3 to start rotating, in the rotating process of the cam 3, the first probe 23 gradually retreats along the first guide rail 81 to the rotating center of the rotating plate 1 under the action of the spring 83, this process is the first motion state; so that the first probe 23 is separated from the shell of the biological measuring instrument or optical tomography instrument, at the same time, as shown in Figure 8 and Figure 9 , the cam 3 is provided with a yoke 4, in the rotating process of the cam 3, the yoke 4 is turned into the radial slot of the ratchet wheel 5, so as to drive the ratchet wheel 5 to rotate, the ratchet wheel 5 in turn drives the rotating plate 1 to rotate; further, after the cam 3 rotates by a certain angle, the yoke 4 is turned out of the radial slot of the ratchet wheel 5, at this time, the first probe reaches the first target position, this process is the second motion state.

[0050] The motor continues to rotate, the cam 3 pushes the second probe 24 to move outward along the second guide rail 81 to the foremost end, as shown in Figure 10 , the second probe 24 reaches the second target position, as shown in Figure 10 . The pulse instruction sent by the program makes the motor stop, at this time, the second probe 24 is switched, this process is the third motion state.

[0051] When the motor continues to rotate to switch the third probe 25, at this time each probe is located at the end position of switching, the sensing sheet 91 is coupled with the second sensor 93 to feed back the position information, preventing the motor from continuing to rotate in the same direction.

[0052] It can be understood that the fork 4 is rotated to the outside of the radial groove of the ratchet wheel 5, and then rotated to enter the radial groove to drive the rotating plate 1 to rotate. Specifically, when the cam 3 starts to rotate, the rotating plate 1 does not immediately start to rotate, but first retreats to the rotating center due to the action of the spring 83. When the fork 4 is rotated into the groove of the ratchet wheel 5, the rotating plate 1 starts to rotate. In addition, it should be noted that the cam 3 is also provided with a locking portion 31, which has a convex circular arc (i.e. an outer convex locking arc). The ratchet wheel 5 is provided with a concave circular arc (i.e. an inner concave locking arc) matched with the number of probes 2. Specifically, as shown in Figure 3 and Figure 4 When the fork 4 is not rotated into the groove of the ratchet wheel 5, the convex circular arc of the cam 3 and the concave circular arc of the ratchet wheel 5 are in a locked and stationary state. Through the above-mentioned arrangement, the switching of the probe 2 can be efficient, safe and stable, and the phenomenon of device jamming, machine damage, etc. during switching can be prevented.

[0053] No matter how many positions of the rotating plate 1 need to be switched, the basic movement is the same as the above steps. When switching at different positions, the motor is automatically determined to rotate forward or reverse by the sensing sheet 91, the first sensor 92 and the second sensor 93.

[0054] The present scheme divides the ratchet wheel, the circular arc self-locking, converts the rotary motion of the cam into the linear motion of the probe, and combines the technical scheme of spring reset, so that the mechanism is simplified, the transmission precision is high, the control is easy, and the safety is high.

[0055] The above is further detailed description of the utility model in combination with specific / preferred embodiments, and cannot be deemed as limitation of the specific implementation of the utility model to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, some substitutions or variations can be made to the described embodiments, and these substitutions or variations shall be deemed as falling within the protection scope of the utility model. In the description of the specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the case of not mutually contradictory, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples. Although the embodiments of the utility model and its advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the protection scope of the patent application.

Claims

1. A probe switching mechanism provided inside a housing of an optical measuring device, characterized by comprising: The probe switching mechanism comprises a rotating plate, two or more probes, a cam, an actuating member, a driven member, a rotating shaft and a driving member. The rotating plate is fixedly connected to the rotating shaft, and the rotating shaft is further fixedly connected to the driven member. The probe comprises a probe body and an extension part, and each probe is vertically installed on the outer periphery of the rotating plate through an elastic limiting structure, so that the probe can move linearly away from or close to the rotating shaft along the radial direction of the rotating plate. The driving member is used for driving the cam to rotate, the cam is located between the extension part and the driven member, and the cam comprises a protruding part, and the actuating member is arranged on the protruding part. The actuating member can rotate to the driven member along with the cam, drive the driven member to rotate, and then drive the rotating plate to rotate, so that the target probe rotates around the rotating shaft to a first target position and then stops. The protruding part can rotate away from or close to the extension part, so that the switched probe is reset to the outer periphery of the rotating plate under the elastic force of the elastic limiting structure or the extension part moves to a second target position at the forefront of the rotating plate in the radial direction, so that the target probe is attached to the shell of the optical measuring device. The outer edge of the rotating plate is fan-shaped or circular.

2. The probe switching mechanism of claim 1, wherein, The elastic limiting structure comprises a guide rail, a sliding plate and a spring, the guide rail is fixedly installed on the rotating plate along the radial direction of the rotating plate, the guide rail is provided with a groove extending in the length direction, the sliding plate is slidably connected to the guide rail, the first end of the sliding plate is fixedly connected to the probe, the second end of the sliding plate is provided with a baffle, and the spring is arranged in the groove of the guide rail, the first end of the spring is fixedly installed on the guide rail, and the second end of the spring abuts against the baffle.

3. The probe switching mechanism of claim 1, wherein, The actuating member is specifically a shift fork, the driven member is specifically a grooved wheel capable of rotating and indexing, the grooved wheel is provided with a radial groove capable of accommodating the shift fork, so that the shift fork can drive the grooved wheel to rotate when the shift fork is in the groove, and the outer edge of the grooved wheel is provided with an inner recessed locking arc, the cam is provided with a locking part, the locking part has an outer convex locking arc capable of cooperating with the shape of the inner recessed locking arc, so that the grooved wheel stops moving when the shift fork is not in the groove.

4. The probe switching mechanism of claim 1, wherein, The grooved wheel is provided with an inner recessed locking arc matched with the number of probes.

5. The probe switching mechanism of claim 4, wherein, The probe switching mechanism further comprises a first sensor, a second sensor and a sensing sheet, the sensing sheet is fixedly installed on the rotating plate, the number of probes is three, the sensing sheet is coupled with the first sensor when the probe is located at an initial position of switching, and the sensing sheet is coupled with the second sensor when the probe is located at an end position of switching.

6. The probe switching mechanism of claim 1, wherein, The driving member is a driving stepper motor.

7. The probe switching mechanism of claim 1, wherein, The probe switching mechanism comprises a shell and a probe switching mechanism as claimed in any one of claims 1-7 arranged in the shell.

8. An optical measuring device, characterized by ​

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