Locking mechanism and double-probe single-photon emission computed tomography equipment probe

Abstract

The utility model discloses a locking mechanism and a double-probe single photon emission computed tomography equipment probe, and relates to the technical field of mechanical structures, the locking mechanism comprises a driving piece, at least two locking pins, a locking pin sleeve and a sensing assembly, and the driving piece is used for driving each locking pin to move between an initial position and a locking position; the number of the lock pin sleeves is multiple, the lock pin sleeves correspond to the lock pins in a one-to-one mode, the lock pin sleeves are provided with installation bases used for allowing lock pin rings on the collimators to be embedded therein, and lock pin holes used for being communicated with inner holes of the lock pin rings are formed in the installation bases in a penetrating mode. When the lock pin is located at the initial position, a preset distance is reserved between the lock pin and the lock pin sleeve, and the locking mechanism is in an unlocking state. When the lock pin is in the locking position, the lock pin is inserted into the lock pin hole, and the locking mechanism is in a locking state. The sensing assembly is used for judging whether the locking mechanism is in a locking state or not. According to the utility model, the collimator is reliably mounted on the probe main body through the movement of the lock pin, and the collimator is simple and convenient to disassemble, assemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical structures, in particular to a locking mechanism and a probe of a double-probe single-photon emission computer tomography imaging device. Background Art

[0002] In dual-probe SPECT (Single Photon Emission Computed Tomography) equipment, different types of collimators need to be installed on the probe. These collimators are usually large plate-like structures made of dense lead alloys. The weight of a single collimator can reach tens of kilograms or even hundreds of kilograms. During the operation of the dual-probe SPECT device, the probe will rotate and may stop at any angle. Therefore, a stable fixing structure is required to ensure that the collimator is firmly fixed to the probe during the operation of the device to prevent it from loosening or falling, so as not to affect data acquisition or cause safety accidents.

[0003] Combination Figures 1-4 One of the fixing schemes in the prior art uses two liftable L-shaped cantilever beams 4 as a clamp to fix the collimator 1. In this design, when the probe body 2 rotates to the collimator 1 facing downward, the entire weight of the collimator 1 is supported by the two cantilever beams 4. This cantilever beam 4 has high strength requirements and is prone to deformation when subjected to heavy loads for a long time. Once deformation occurs, the clamp becomes loose, which affects the quality of data acquisition of the probe body 2.

[0004] Combination Figures 5-7 Another fixing scheme in the prior art is to provide a slide groove on the probe body 2 for the collimator 1 to slide into. When installing the collimator 1, push it along the slide groove until it reaches the limit. A safety lock 5 is provided on the edge of the probe body 2. After the collimator 1 is in place, the collimator 1 and the probe body 2 are locked by the cylindrical pin of the safety lock 5. In order to make it easier for the collimator 1 to slide in the slide groove and for the cylindrical pin to be inserted into the circular hole of the collimator 1, a certain gap must be left between the collimator 1 and the slide groove, and between the cylindrical pin and the circular hole of the collimator 1. However, during the operation of the equipment, when the probe body 2 is rotated and positioned under different clinical conditions, due to the existence of these gaps, the collimator 1 will impact the probe body 2, which will not only affect the service life of the probe body 2, but also may reduce the quality of data acquisition.

[0005] Therefore, how to achieve reliable installation of the collimator has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of the present utility model is to provide a locking mechanism to achieve reliable installation of the collimator.

[0007] Another purpose of the present utility model is to provide a probe for a dual-probe single-photon emission computed tomography imaging device including the above-mentioned locking mechanism.

[0008] To achieve the above purpose, the present utility model provides the following technical solutions:

[0009] A locking mechanism for installing a collimator onto a probe body, comprising:

[0010] A driving member;

[0011] Locking pins, at least two, provided on the driving member, and the driving member is used to drive each of the locking pins to move between an initial position and a locking position;

[0012] Locking pin sleeves, a plurality corresponding to the locking pins one by one, and the locking pin sleeves are provided with mounting seats for the locking pin rings on the collimator to be inserted, and the mounting seats are provided with locking pin holes that penetrate through and communicate with the inner holes of the locking pin rings;

[0013] An induction component, including a baffle, a first sensor and a second sensor, the baffle is provided on the locking pin, and the first sensor and the second sensor are used to be provided on the probe body;

[0014] Wherein, when the locking pin is in the initial position, there is a preset distance between the locking pin and the locking pin sleeve, and the baffle triggers the second sensor; when the locking pin is in the locking position, the locking pin is inserted into the locking pin hole, and the baffle triggers the first sensor.

[0015] Optionally, in the above-mentioned locking mechanism, it further includes linear guide rails for being provided on the probe body, a plurality of the linear guide rails corresponding to the locking pins one by one, and both ends of the linear guide rails extend towards the initial position and the locking position respectively, and the locking pins are slidably provided on the linear guide rails through sliders.

[0016] Optionally, in the above-mentioned locking mechanism, it further includes first limit blocks for being provided on the probe body, a plurality of the first limit blocks corresponding to the locking pins one by one;

[0017] When the locking pin is in the initial position, the first limit block abuts against the locking pin.

[0018] Optionally, in the above-mentioned locking mechanism, it further includes second limit blocks for being provided on the probe body, a plurality of the second limit blocks corresponding to the locking pins one by one;

[0019] When the lock pin is in the locked position, the lock pin passes through the lock pin hole and abuts against the second limiting block.

[0020] Optionally, in the above locking mechanism, a limiting groove for the lock pin to be embedded is provided on the second limiting block; and / or,

[0021] The second limiting block and the probe body are of an integral structure.

[0022] Optionally, in the above locking mechanism, there are two lock pins, which are respectively arranged at both ends of the driving member, and the driving member is used to drive the two lock pins to approach or move away from each other.

[0023] Optionally, in the above locking mechanism, it further includes a floating sleeve for being arranged on the probe body. The floating sleeve and the probe body form a floating channel. The extending direction of the floating channel is parallel to the moving direction of the lock pin between the initial position and the locked position. The driving member is movably arranged in the floating channel along the axial direction of the floating channel.

[0024] Optionally, in the above locking mechanism, it further includes a floating sleeve for being arranged on the probe body. The floating sleeve and the probe body form a floating channel. The extending direction of the floating channel is parallel to the moving direction of the lock pin between the initial position and the locked position. The driving member is movably arranged in the floating channel along the axial direction of the floating channel.

[0025] Optionally, in the above locking mechanism, the moving direction of the lock pin from the initial position to the locked position is the locking direction;

[0026] The lock pin hole is a square-section hole, and the side wall of the lock pin hole near the opening of the mounting seat is a first inclined surface. The first inclined surface is used to make the cross-sectional area of the lock pin hole gradually shrink in the locking direction, so that the lock pin hole is wedge-shaped;

[0027] A second inclined surface for sliding cooperation and locking with the first inclined surface is provided on the lock pin.

[0028] A probe of a dual-probe single-photon emission computed tomography imaging device includes a probe body, a collimator, and the above locking mechanism;

[0029] There are two groups of the locking mechanisms, which are arranged on the probe body;

[0030] A plurality of lock pin rings are provided on the collimator. Each lock pin ring is correspondingly embedded into each mounting seat, and the lock pin passes through the lock pin hole and the inner hole of the lock pin ring.

[0031] Optionally, in the probe of the dual-probe single-photon emission computed tomography (SPECT) device described above, the moving direction of the locking pin from the initial position to the locking position is the locking direction;

[0032] The inner hole of the locking pin ring is a square-section hole, and the side wall of the inner hole of the locking pin ring away from the collimator is a third inclined surface, which is used to make the cross-sectional area of the inner hole of the locking pin ring gradually decrease in the locking direction, so that the inner hole of the locking pin ring is wedge-shaped;

[0033] A fourth inclined surface for sliding cooperation and locking with the third inclined surface is provided on the locking pin.

[0034] The locking mechanism provided by the present invention includes a driving member, a locking pin, a locking pin sleeve and an induction component. There are at least two locking pins, which are arranged on the driving member. The driving member is used to drive each locking pin to move between the initial position and the locking position; there are multiple locking pin sleeves corresponding to the locking pins one by one. An installation seat for embedding the locking pin ring on the collimator is provided on the locking pin sleeve, and a locking pin hole communicating with the inner hole of the locking pin ring is throughly opened on the installation seat. The induction component is used to judge whether the locking mechanism is in the locked state, and it includes a blocking piece, a first sensor and a second sensor. The blocking piece is arranged on the locking pin, and the first sensor and the second sensor are used to be arranged on the probe body.

[0035] Wherein, when the locking pin is in the initial position, there is a preset distance between the locking pin and the locking pin sleeve, and the blocking piece triggers the second sensor, and the locking mechanism is in the unlocked state; when the locking pin is in the locking position, the locking pin is inserted into the locking pin hole, and the blocking piece triggers the first sensor, and the locking mechanism is in the locked state.

[0036] After each locking pin ring of each collimator is installed on the installation seat, start the driving member to make the locking pin move from the initial position to the locking position. During the movement of the locking pin towards the locking position, the locking pin passes through the locking pin hole and the locking pin ring to realize the locking of the locking pin ring and the locking pin sleeve. When it is necessary to replace the collimator, start the driving member to drive each locking pin to move towards the initial position to release the locking of the collimator.

[0037] Compared with the prior art, the locking mechanism provided by the present invention reliably installs the collimator on the probe body through the locking pin, and the disassembly, installation and replacement operations of the collimator are simple and convenient.

[0038] The probe of the dual-probe single-photon emission computed tomography (SPECT) device provided by the present invention includes the above-mentioned locking mechanism, so it also has the above-mentioned beneficial effects. Other structures refer to the prior art and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figures 1-4 It is a schematic structural diagram of a collimator fixing solution in the prior art;

[0041] Figures 5-7 It is a schematic structural diagram of another collimator fixing solution in the prior art;

[0042] Figure 8 It is an exploded view of the probe of a dual-head single-photon emission computed tomography imaging device disclosed in the embodiments of the present invention;

[0043] Figure 9 It is an exploded view of a locking mechanism disclosed in the embodiments of the present invention;

[0044] Figure 10 It is a schematic structural diagram of a locking mechanism in the unlocked state disclosed in the embodiments of the present invention;

[0045] Figure 11 It is a schematic structural diagram of a locking mechanism in the locked state disclosed in the embodiments of the present invention;

[0046] Figure 12 It is a schematic structural diagram of the collimator disclosed in the embodiments of the present invention;

[0047] Figure 13 It is a schematic structural diagram of the installation of a locking mechanism and a probe body disclosed in the embodiments of the present invention;

[0048] Figure 14 For Figure 13 The enlarged view of part A in

[0049] Figure 15 It is an assembly schematic diagram of a locking pin, a locking pin sleeve and a locking pin ring when a locking mechanism disclosed in the embodiments of the present invention is in the unlocked state;

[0050] Figure 16 It is an assembly schematic diagram of a locking pin, a locking pin sleeve and a locking pin ring when a locking mechanism disclosed in the embodiments of the present invention is in the locked state;

[0051] Figure 17 It is a schematic diagram of the connection relationship between a driving member and a connecting member disclosed in the embodiments of the present invention;

[0052] Figure 18Schematic diagram of the cable fixing method of the driving member disclosed in the embodiment of the present utility model;

[0053] Figure 19 Schematic diagram of the structure of another locking mechanism disclosed in the embodiment of the present utility model;

[0054] Figure 20 Schematic diagram of the structure of yet another locking mechanism disclosed in the embodiment of the present utility model.

[0055] Among them, 1 is a collimator, 11 is a locking pin ring, and 111 is a third inclined plane;

[0056] 2 is a probe body, and 21 is a second limiting block;

[0057] 3 is a locking mechanism, 31 is a locking pin sleeve, 311 is a first inclined plane, 32 is a locking pin, 321 is a second inclined plane, 322 is a fourth inclined plane, 33 is a connecting member, 331 is a pin shaft, 34 is a linear guide rail, 35 is a first limiting block, 36 is a driving member, 361 is a connecting hole, 37 is a retaining piece, 38 is a sensor assembly, 39 is a cable, and 391 is a cable fixing point;

[0058] 4 is a cantilever beam;

[0059] 5 is a safety lock. Specific implementation manners

[0060] The core of the present utility model lies in disclosing a locking mechanism to achieve reliable installation of the collimator.

[0061] Another core of the present utility model lies in disclosing a probe of a dual-probe single-photon emission computed tomography imaging device including the above-mentioned locking mechanism.

[0062] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the embodiments shown below do not impose any limitation on the content of the utility model recorded in the claims. In addition, all the contents of the constitution shown in the following embodiments are not limited to those necessary for the solution of the utility model recorded in the claims. It should be noted that for the convenience of description, only the parts related to the relevant utility model are shown in the drawings. Without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0063] Combined with Figures 2-18, the locking mechanism 3 disclosed by the present utility model is used to mount the collimator 1 onto the probe body 2. The locking mechanism 3 includes a driving member 36, a locking pin 32, a locking pin sleeve 31, and an induction component. There are at least two locking pins 32, which are arranged on the driving member 36. The driving member 36 is used to drive each locking pin 32 to move between an initial position and a locking position. There are multiple locking pin sleeves 31 corresponding to the locking pins 32 one by one. An installation seat for the locking pin ring 11 on the collimator 1 to be embedded is provided on the locking pin sleeve 31, and a locking pin hole communicating with the inner hole of the locking pin ring 11 is throughly opened on the installation seat. Among them, when the locking pin 32 is in the initial position, there is a preset distance between the locking pin 32 and the locking pin sleeve 31, and the locking mechanism 3 is in an unlocked state. When the locking pin 32 is in the locking position, the locking pin 32 is inserted into the locking pin hole, and the locking mechanism 3 is in a locked state.

[0064] The induction component is used to judge whether the locking mechanism 3 is in a locked state. It includes a sensor component 38 and a stop piece 37. The sensor component 38 is used to be arranged on the probe body 2, and the stop piece 37 is arranged on the locking pin 32. The stop piece 37 is used to trigger the sensor component 38 to correspondingly obtain the position of the locking pin 32, and then judge the state of the locking mechanism 3.

[0065] Specifically, the sensor component 38 includes a first sensor and a second sensor. Both the first sensor and the second sensor are used to be arranged on the probe body 2. When the locking pin 32 is in the locking position, the stop piece 37 triggers the first sensor, indicating that the locking mechanism 3 is in a locked state. When the locking pin 32 is in the initial position, the stop piece 37 triggers the second sensor, indicating that the locking mechanism 3 is in an unlocked state.

[0066] Combined with Figure 12 , on both sides of the installation surface of a collimator 1 facing the probe body 2, a set of locking pin rings 11 is provided respectively. The number of locking pin rings 11 in each set of locking pin rings 11 is at least two. Two sets of locking mechanisms 3 are provided on the probe body 2, and the two sets of locking mechanisms 3 are used to fix a set of locking pin rings 11 respectively. During the specific assembly process, first drive each locking pin 32 to the initial position through the driving member 36. In the initial position, there is a preset distance between the locking pin 32 and the locking pin sleeve 31. At this time, the installation seat can allow the locking pin ring 11 to be normally installed. After each locking pin ring 11 is installed on the installation seat, start the driving member 36 to make the locking pin 32 move towards the locking position. During the process of the locking pin 32 moving towards the locking position, the locking pin 32 passes through the locking pin hole and the locking pin ring 11 to realize the locking of the locking pin ring 11 and the locking pin sleeve 31. When it is necessary to replace the collimator 1, start the driving member 36 to drive each locking pin 32 to move towards the initial position to release the locking of the collimator 1.

[0067] Compared with the prior art, the locking mechanism 3 disclosed by the utility model reliably mounts the collimator 1 on the probe body 2 through the locking pin 32, and the disassembly, replacement and operation of the collimator 1 are simple and convenient.

[0068] According to the actual situation, the sensor assemblies 38 and the baffles 37 are usually multiple groups corresponding one-to-one to the locking pins 32. The detection results of each sensor assembly 38 can be uniformly converted into the light emission color of the status light on the probe body 2 or indicated by other solutions. The status light is arranged at a position observable by the operator. When the sensor assemblies 38 detect that all the locking pins 32 are in the locked position, the status light emits light of the first color, indicating that the locking mechanism 3 is in the locked state. When the sensor assemblies 38 detect that all the locking pins 32 are in the initial position, the status light emits light of the second color, and the locking mechanism 3 is in the unlocked state.

[0069] Taking the number of locking pins 32 being two as an example, there are two baffles 37, a first sensor and a second sensor. When both first sensors are triggered, it indicates that the locking pins 32 are fully locked. When both second sensors are triggered, it indicates that the locking pins 32 are fully opened. Since the moving time of the locking pins 32 between the initial position and the locked position is short, therefore, if neither the first sensor nor the second sensor corresponding to a certain locking pin 32 detects the baffle 37, it indicates that the locking pin 32 is stuck at the intermediate position between the initial position and the locked position, that is, there may be faults such as the collimator 1 not being placed flat or foreign objects stuck in the locking pin holes. At this time, the sensor assembly 38 reports a fault to notify the operator for maintenance.

[0070] The above-mentioned first sensor and second sensor are usually photoelectric sensors, and in addition, they can also be other sensors such as distance sensors and image sensors that can detect the position of the locking pin 32.

[0071] In order to accurately guide the locking pin 32 to the position where the locking pin sleeve 31 is located, the locking mechanism 3 further includes linear guide rails 34 arranged on the probe body 2. There are multiple linear guide rails 34 corresponding one-to-one to the locking pins 32, and both ends of the linear guide rails 34 extend towards the initial position and the locked position respectively. The locking pins 32 are slidably arranged on the linear guide rails 34 through sliders and can slide along the linear guide rails 34.

[0072] In order to limit the initial position of the movement of the locking pin 32, the locking mechanism 3 further includes first limit blocks 35 arranged on the probe body 2. There are multiple first limit blocks 35 corresponding one-to-one to the locking pins 32. When the locking pin 32 is driven by the driving member 36 to move to the initial position, the first limit block 35 abuts against the locking pin 32, and the locking pin 32 cannot move further.

[0073] Correspondingly, in order to define the locking position of the locking pin 32, the locking mechanism 3 further includes a second limiting block 21 for being arranged on the probe body 2, and there are a plurality of second limiting blocks 21 corresponding to the locking pins 32 one by one; when the locking pin 32 is driven by the driving member 36 to move to the locking position, the locking pin 32 passes through the locking pin hole and abuts against the second limiting block 21, and the locking pin 32 cannot move further.

[0074] Furthermore, a limiting groove (not shown in the figure) into which the locking pin 32 can be inserted may be arranged on the second limiting block 21. The second limiting block 21 and the probe body 2 may be of an integral structure.

[0075] In a specific embodiment disclosed by the present utility model, there are two locking pins 32, which are respectively arranged at both ends of the driving member 36, and the driving member 36 is used to drive the two locking pins 32 to move in directions approaching or separating from each other, and the movement tracks of the two locking pins 32 are on the same straight line. Specifically, in combination with Figure 17 , the locking pins 32 are respectively connected to both ends of the driving member 36 through connecting members 33. When the driving member 36 expands and contracts, the two locking pins 32 can be driven to move along the linear guide rail 34. The above-mentioned retaining piece 37 may be arranged on the connecting member 33.

[0076] In combination with Figure 10 and Figure 11 , the figure shows a technical solution in which when the two locking pins 32 approach each other, the locking pins 32 move to the initial position, and when the two locking pins 32 separate from each other, the locking pins 32 move to the locking position. In this embodiment, the driving member 36 may be an electric push rod, and the electric push rod is not directly connected to the probe body 2, and it is floatingly arranged on the probe body 2. The locking mechanism 3 realizes the movement guiding of the locking pin 32 through the linear guide rail 34, and limits the movement stroke of the locking pin 32 through the first limiting block 35 and the second limiting block 21. The scheme of driving two locking pins 32 to move by a single push rod has the advantage of simple structure.

[0077] In combination with Figure 10 , in this embodiment, when the two locking pins 32 respectively abut against the two first limiting blocks 35, the two locking pins 32 are both in the initial position, at this time the distance between them is the smallest, and limited by the first limiting block 35, the electric push rod retracts to the shortest state and cannot drive the locking pin 32 to move further. In combination with Figure 11 , when the two locking pins 32 respectively pass through their corresponding locking pin sleeves 31 and abut against the second limiting block 21, the distance between the two locking pins 32 is the largest, and limited by the second limiting block 21, the electric push rod extends to the longest state and cannot drive the locking pin 32 to move further. Among them, the maximum stroke (including the expansion and contraction length) of the electric push rod is the sum of the strokes of the two locking pins 32. For example, if the maximum stroke of the two locking pins 32 between the initial position and the locking position is 30 mm, then the maximum stroke of the electric push rod is 60 mm.

[0078] Those skilled in the art can understand that since the electric push rod is floatingly arranged on the probe body 2 and the resistance of the two locking pins 32 during movement is different, the movement of the two locking pins 32 is generally asynchronous. Specifically, when the electric push rod starts to extend from the initial state, the two locking pins 32 start to move in the direction away from each other. The locking pin 32 with less resistance among the two locking pins 32 will first contact the corresponding second limit block 21 and then stop, and the other locking pin 32 continues to move until it also contacts the corresponding second limit block 21, and the movement is completed at this time. When the electric push rod starts to retract from the extended state, the locking pin 32 with less resistance among the two locking pins 32 first contacts the corresponding first limit block 35 and stops, and the other locking pin 32 continues to move until it also abuts against the first limit block 35, and the movement is completed at this time. This structural form of the floating arrangement of the electric push rod can ensure the adaptive adjustment of the moving position of the locking pin 32 and ensure the reliable locking of the locking pin 32.

[0079] The electric push rod is driven by a DC motor. Due to the self-locking characteristic of the trapezoidal screw rod in the electric push rod, when the motor of the electric push rod does not rotate actively, the locking pin 32 cannot move actively. When the locking mechanism 3 is in the locked state, unless the locking pin 32 is pulled out or cut off, the collimator 1 will not fall off, and the connection reliability of the locking mechanism 3 is high.

[0080] Combined with Figure 17 , a connection hole 361 is provided at each end of the electric push rod. The connecting piece 33 is connected to the connection hole 361 through a pin shaft 331. The connecting piece 33 is fixedly connected to the locking pin 32. Preferably, the connecting piece 33 is also fixedly connected to the electric push rod without rotation to ensure the stable force on the locking pin 32. The cable 39 of the driving piece 36 is bent and then fixed on the probe body 2, and there is a certain extended length of the cable 39 between the cable fixing point 391 where the cable 39 is connected to the probe body 2, so as to adapt to the movement of the electric push rod and avoid the stretching of the cable 39.

[0081] Furthermore, in order to guide the telescopic movement of the electric push rod, the locking mechanism 3 further includes a floating sleeve (not shown in the figure) for being arranged on the probe body 2. The floating sleeve and the probe body 2 jointly enclose a floating channel. The extending direction of the floating channel is parallel to the moving direction of the locking pin 32 between the initial position and the locking position. The electric push rod is movably arranged in the floating channel along the axial direction of the floating channel. By providing the floating sleeve, it is ensured that during the driving process, the electric push rod can move along the floating channel to realize the movement guidance of the electric push rod.

[0082] Define the moving direction of each locking pin 32 from the initial position to the locking position as the locking direction. Combined with Figure 19 , Figure 19The black arrow in indicates the locking direction. In some embodiments, when the two locking pins 32 approach each other, the locking pins 32 move towards the locking position, and when the two locking pins 32 move away from each other, the locking pins 32 move towards the initial position. The foregoing embodiments occupy less space compared to this solution and are preferred embodiments.

[0083] In addition, a driving member 36 using a transmission structure such as a gear driven by a motor can also drive the locking pin 32 to translate between the initial position and the locking position, and the locking pin 32 can also move between the initial position and the locking position by means of a movement mode such as rotation other than translation, which will not be elaborated here.

[0084] In a specific embodiment disclosed by the present utility model, in combination with Figure 20 , Figure 20 the black arrow in indicates the locking direction. The driving member 36 is a cylinder fixedly arranged on the probe body 2, and a connecting member 33 is arranged at the output end of the driving member 36. The connecting member 33 is integrally rod-shaped, and a plurality of locking pins 32 are arranged at intervals on the connecting member 33 along the extending direction of the connecting member 33. When the driving member 36 pushes the connecting member 33 to move, the connecting member 33 drives each locking pin 32 to move synchronously in a direction close to or away from the locking pin sleeve 31.

[0085] In this embodiment, the number of linear guide rails 34 can be one, and only the connecting member 33 is guided. The first limit block 35 and the second limit block 21 can also be one, and only the moving stroke of the connecting member 33 is limited.

[0086] The probe of the dual-probe single-photon emission computed tomography imaging device disclosed by the present utility model includes a probe body 2, a collimator 1, and the above-mentioned locking mechanism 3; the locking mechanism 3 is in two groups and is arranged on the probe body 2; a plurality of locking pin rings 11 are arranged on the collimator 1, and each locking pin ring 11 is correspondingly embedded in each mounting seat, and the locking pin 32 is inserted into the locking pin hole and the inner hole of the locking pin ring 11 to realize the fixation of the collimator 1 and the probe body 2. Due to the above-mentioned locking mechanism 3, the above-mentioned beneficial effects are also achieved, and other structures refer to the prior art and will not be elaborated here.

[0087] In combination with Figure 11 , a structural solution in which a locking pin ring 11 is arranged at each of the four corners of a collimator 1 is shown in this figure. When the collimator 1 is installed on the probe body 2, the four locking pin rings 11 are correspondingly installed on the four locking pin sleeves 31, and the inner holes of the locking pin rings 11 are aligned with the locking pin holes.

[0088] In order to optimize the locking effect of the locking pin 32 on the locking pin sleeve 31 and the locking pin ring 11, in a specific embodiment disclosed by the present utility model, the moving direction of the locking pin 32 from the initial position to the locking position is defined as the locking direction, the locking pin hole is a square-section hole, in combination with Figure 15, the locking pin ring 11 is installed on the mounting base from the opening of the mounting base along the direction shown by the black arrow in the figure. Define the side wall of the locking pin hole close to the opening of the mounting base as the first inclined surface 311. The first inclined surface 311 is used to gradually reduce the cross-sectional area of the locking pin hole in the locking direction, so that the locking pin hole has a wedge-shaped structure; a second inclined surface 321 is provided on the locking pin 32, and the second inclined surface 321 is used for sliding cooperation and locking with the first inclined surface 311, so as to realize the reliable installation of the locking pin 32 and the locking pin sleeve 31. The inner hole of the locking pin ring 11 is a square-section hole, and the two side walls of the inner hole of the locking pin ring 11 are perpendicular to the collimator 1. Define the side wall of the inner hole of the locking pin ring 11 away from the collimator 1 as the third inclined surface 111. The third inclined surface 111 is used to gradually reduce the cross-sectional area of the inner hole of the locking pin ring 11 in the locking direction, so that the inner hole of the locking pin ring 11 has a wedge shape. A fourth inclined surface 322 is provided on the locking pin 32, and the fourth inclined surface 322 is used for sliding cooperation and locking with the third inclined surface 111, so as to realize the reliable installation of the locking pin 32 and the locking pin ring 11.

[0089] The setting of the second inclined surface 321 and the fourth inclined surface 322 makes the locking pin 32 have a wedge-shaped structure. When the locking pin ring 11 is installed on the mounting base, the square-section inner hole of the locking pin ring 11 is aligned with the square-section locking pin hole of the locking pin sleeve 31, and the third inclined surface 111 and the first inclined surface 311 together form a wedge-shaped hole corresponding to the wedge-shaped structure of the locking pin 32. During the process of the locking pin 32 moving towards the locking position, the second inclined surface 321 and the fourth inclined surface 322 respectively slide cooperate with the first inclined surface 311 and the third inclined surface 111. This kind of wedge-shaped locking structure uses a smaller driving force to reliably install the collimator 1 on the probe body 2, and ensures that in any posture, the collimator 1 is closely attached to the probe body 2 without loosening. At the same time, it can also improve the tolerance of the relative position between the collimator 1 and the probe body 2 to a certain extent. Even if the collimator 1 is not completely attached after being placed on the probe body 2, the locking pin 32 can still be smoothly inserted into the locking pin hole, and the position relationship between the collimator 1 and the probe body 2 can be corrected through the wedge-shaped structure, ensuring the data acquisition quality and improving the service life.

[0090] Exemplarily, the inclination angles of the first inclined surface 311, the second inclined surface 321, the third inclined surface 111 and the fourth inclined surface 322 can all be 2°.

[0091] In some embodiments, the locking pin hole and the inner hole of the locking pin ring 11 can also be set as conical holes with a circular cross-section, and the end with a larger aperture of the conical hole is arranged towards the initial position of the locking pin 32. It is only necessary to set the locking pin 32 as a conical or frustum structure with a corresponding taper.

[0092] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Specific technical means in some embodiments can be combined, in part or in whole, with those in another embodiment, provided that they are not explicitly excluded by the other embodiment. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A locking mechanism for mounting a collimator (1) to a probe body (2), characterized in that, Comprising: A driving member (36); Lock pins (32), at least two of them, and are arranged on the driving member (36), and the driving member (36) is used to drive each of the lock pins (32) to move between an initial position and a locking position; Lock pin sleeves (31), a plurality of them corresponding one-to-one to the lock pins (32), and mounting seats for the lock pin rings (11) on the collimator (1) to be embedded are arranged on the lock pin sleeves (31), and lock pin holes communicating with the inner holes of the lock pin rings (11) are through-opened on the mounting seats; An induction assembly, including a baffle (37), a first sensor and a second sensor, the baffle (37) is arranged on the lock pin (32), and the first sensor and the second sensor are used to be arranged on the probe body (2); Wherein, when the lock pin (32) is in the initial position, there is a preset distance between the lock pin (32) and the lock pin sleeve (31), and the baffle (37) triggers the second sensor; when the lock pin (32) is in the locking position, the lock pin (32) is inserted into the lock pin hole, and the baffle (37) triggers the first sensor.

2. The locking mechanism according to claim 1, characterized in that, It further includes linear guide rails (34) to be arranged on the probe body (2), a plurality of the linear guide rails (34) corresponding one-to-one to the lock pins (32), and both ends of the linear guide rails (34) extend towards the initial position and the locking position respectively, and the lock pins (32) are slidably arranged on the linear guide rails (34) through sliders.

3. The locking mechanism according to claim 1, wherein It further includes first limit blocks (35) to be arranged on the probe body (2), a plurality of the first limit blocks (35) corresponding one-to-one to the lock pins (32); When the lock pin (32) is in the initial position, the first limit block (35) abuts against the lock pin (32).

4. The locking mechanism according to claim 1, characterized in that, It further includes second limit blocks (21) to be arranged on the probe body (2), a plurality of the second limit blocks (21) corresponding one-to-one to the lock pins (32); When the lock pin (32) is in the locking position, the lock pin (32) passes through the lock pin hole and abuts against the second limit block (21).

5. The locking mechanism according to claim 4, wherein, A limit groove for the lock pin (32) to be embedded is arranged on the second limit block (21); and / or, The second limit block (21) and the probe body (2) are of an integral structure.

6. The locking mechanism according to claim 1, characterized in that, There are two lock pins (32), which are respectively arranged at both ends of the driving member (36), and the driving member (36) is used to drive the two lock pins (32) to approach or move away from each other.

7. The locking mechanism according to claim 6, characterized in that, It further includes a floating sleeve to be arranged on the probe body (2), and the floating sleeve and the probe body (2) form a floating channel, the extending direction of the floating channel is parallel to the moving direction of the lock pin (32) between the initial position and the locking position, and the driving member (36) is movably arranged in the floating channel along the axial direction of the floating channel.

8. The locking mechanism according to claim 1, characterized in that The moving direction of the lock pin (32) from the initial position to the locking position is the locking direction; The pin hole has a square cross-sectional hole, and the side wall of the pin hole near the opening of the mounting seat is a first inclined surface (311). The first inclined surface (311) is used to gradually reduce the cross-sectional area of the pin hole in the locking direction, so that the pin hole is wedge-shaped; A second inclined surface (321) for slidingly mating and locking with the first inclined surface (311) is provided on the pin (32).

9. A probe of a dual-probe single-photon emission computed tomography imaging device, characterized in that, It includes a probe body (2), a collimator (1) and a locking mechanism (3) as described in any one of claims 1-8; There are two sets of the locking mechanisms (3), which are arranged on the probe body (2); A plurality of pin rings (11) are provided on the collimator (1). Each of the pin rings (11) is correspondingly embedded in each of the mounting seats, and the pin (32) passes through the pin hole and the inner hole of the pin ring (11).

10. The probe of the dual-probe single-photon emission computed tomography imaging device according to claim 9, wherein The moving direction of the pin (32) from the initial position to the locking position is the locking direction; The inner hole of the pin ring (11) has a square cross-sectional hole. The side wall of the inner hole of the pin ring (11) away from the collimator (1) is a third inclined surface (111). The third inclined surface (111) is used to gradually reduce the cross-sectional area of the inner hole of the pin ring (11) in the locking direction, so that the inner hole of the pin ring (11) is wedge-shaped; A fourth inclined surface (322) for slidingly mating and locking with the third inclined surface (111) is provided on the pin (32).

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