A nest plate correcting and positioning mechanism

Abstract

The present application provides a nest plate correction and positioning mechanism, comprising a base plate, a linear cam, a pressing mechanism and a nest plate positioning plate. The linear cam and the nest plate positioning plate are arranged on the base plate, and the pressing mechanism comprises a pressing block in driving connection with the linear cam. The pressing mechanism is provided with four groups, which are respectively located at four corner portions of the nest plate and symmetrically arranged around the nest plate positioning plate. The horizontal movement of the linear cam drives the pressing block to lift, so as to realize the pressing or releasing of the nest plate placed on the nest plate positioning plate. The present application realizes the accurate positioning and effective correction of the nest plate by the linear cam driving the pressing mechanism, solves the problem of difficult taking and placing of the needle cylinder caused by the deformation of the nest plate, and ensures the uniform distribution of the pressing force through the symmetric arrangement of the multiple pressing mechanisms, thereby improving the success rate of the downstream needle cylinder taking process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical instrument processing equipment, and in particular relates to a nest plate correcting and positioning mechanism. BACKGROUND

[0002] At present, the syringe barrel in medical instrument production is usually positioned and processed by using a nest plate. Since the nest plate is made of plastic material, it will appear to be concave in the middle and high around. When the glass syringe barrel is placed in the deformed nest plate, it will appear to be not straight, which seriously affects the normal operation of the downstream syringe barrel taking mechanism. At the same time, due to the existence of deformation, the positioning of the nest plate is not accurate, which also affects the success rate of taking the syringe barrel.

[0003] In the prior art, the commonly used center positioning plate only has a supporting function and does not involve the function of pressing the four corners of the nest plate, and does not have the function of correcting the nest plate. This makes the nest plate prone to deformation during placement and use, affecting the stability and processing precision of the production process. In addition, the positioning of the nest plate in the prior art is not accurate enough, resulting in positioning deviation in the subsequent process and reducing the production efficiency.

[0004] Therefore, there is an urgent need to provide a mechanism for correcting and positioning the nest plate. SUMMARY

[0005] The purpose of the present application is to provide a nest plate correcting and positioning mechanism to solve the technical problems of easy deformation and inaccurate positioning of the nest plate in the prior art.

[0006] In order to achieve the above-mentioned purpose of the application, the present application provides a nest plate correcting and positioning mechanism, comprising:

[0007] a bottom plate;

[0008] a straight cam provided on the bottom plate;

[0009] a pressing mechanism, the pressing mechanism comprising a pressing block in transmission connection with the straight cam, and a nest plate positioning plate provided on the bottom plate;

[0010] wherein the horizontal movement of the straight cam drives the pressing block to lift or lower, so as to realize the pressing or releasing of the nest plate placed on the nest plate positioning plate.

[0011] Optionally, the pressing mechanism is provided with four groups, respectively located at the four corner portions of the nest plate, and symmetrically arranged around the nest plate positioning plate.

[0012] Optionally, the pressing mechanism further comprises:

[0013] a support block fixed on the bottom plate, one end of the pressing block being in rotary connection with the top of the support block;

[0014] An L-shaped transition block, a lower end of the L-shaped transition block is provided with a roller, an upper end of the L-shaped transition block is rotationally connected with the support block, the roller is in rolling contact with an upper surface of the linear cam;

[0015] A connecting block, two ends of the connecting block are respectively hingedly connected with the pressing block and the L-shaped transition block; and

[0016] A tension spring, one end of the tension spring is connected with the support block, and the other end of the tension spring is connected with the connecting block.

[0017] Optionally, the support block comprises oppositely arranged first and second support blocks, the first and second support blocks are fixed on the bottom plate, and the linear cam passes through a gap between the first and second support blocks.

[0018] Optionally, a tension spring fixing shaft is further arranged on the first support block, and one end of the tension spring is connected with the tension spring fixing shaft.

[0019] Optionally, an inclined surface is arranged on the upper surface of the linear cam, the inclined surface cooperates with the roller of the pressing mechanism, and is used for converting horizontal movement of the linear cam into vertical movement of the pressing block.

[0020] Optionally, a lateral roller is further arranged on the bottom plate and in contact with a lateral surface of the linear cam when the linear cam moves.

[0021] Optionally, a vertical roller assembly is further arranged, the vertical roller assembly comprises a vertical roller groove fixed on the bottom plate and a vertical roller arranged on the linear cam, and the vertical roller rolls in the vertical roller groove and is used for guiding horizontal movement of the linear cam.

[0022] Optionally, reset assemblies are further arranged on two sides of the linear cam respectively, and the reset assemblies are used for driving the linear cam to reset in a horizontal direction after the linear cam completes a pressing action.

[0023] Optionally, the reset assembly comprises:

[0024] A guide rod, the guide rod is fixedly arranged on the bottom plate;

[0025] A reset spring, the reset spring is sleeved on the guide rod; and

[0026] A limiting sliding block, one end of the limiting sliding block is fixed on the linear cam, and the other end of the limiting sliding block is sleeved on the guide rod, and the limiting sliding block compresses or restores the reset spring along with movement of the linear cam.

[0027] Optionally, the nest plate positioning plate surrounds a nest plate placement area, and the nest plate positioning plate is provided with a chamfer corresponding to the pressing block at the edge of the nest plate placement area.

[0028] Optionally, the nest plate placement area is provided with a plurality of through holes, and the arrangement of the through holes corresponds to the position of the needle cylinder on the nest plate.

[0029] The present application realizes effective pressing and correction of the nest plate by setting a linear cam and a pressing mechanism on the base plate, driving the pressing block to rise and fall by horizontal movement of the linear cam, and solves the problem of deformation of the nest plate. At the same time, the setting of the nest plate positioning plate ensures accurate positioning of the nest plate and improves the success rate of the downstream needle cylinder taking process.

[0030] Further, the stable transmission of the linear cam movement is realized by the cooperation of the L-shaped transition block, the roller and the tension spring in the pressing mechanism; the reliable resetting of the linear cam is ensured by the setting of the resetting assembly; the stability and directivity of the linear cam movement are ensured by the setting of the vertical roller assembly and the lateral roller, and the overall working reliability of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a nest plate structure schematic diagram in the embodiment of the present application Figure 1 ;

[0032] Figure 2 is a nest plate structure schematic diagram in the embodiment of the present application Figure 2 ;

[0033] Figure 3 is a state schematic diagram of the needle cylinder before correction in the embodiment of the present application

[0034] Figure 4 is a state schematic diagram of the needle cylinder after correction in the embodiment of the present application

[0035] Figure 5 is a structure schematic diagram of the nest plate correction and positioning mechanism in position one in the embodiment of the present application

[0036] Figure 6 is a structure schematic diagram of the nest plate correction and positioning mechanism in position two in the embodiment of the present application

[0037] Figure 7 is a structure schematic diagram of the pressing mechanism in position one in the embodiment of the present application Figure 1 ;

[0038] Figure 8 is a structure schematic diagram of the pressing mechanism in position two in the embodiment of the present application Figure 1 ;

[0039] Figure 9Structure diagram of the pressing mechanism in position one in the embodiment of the present application Figure 2 ;

[0040] Figure 10 Structure diagram of the pressing mechanism in position two in the embodiment of the present application Figure 2 .

[0041] In the figure, 1, base plate; 2, straight cam; 3, pressing mechanism; 31, support block; 32, tension spring fixing shaft; 33, tension spring; 34, L-shaped transition block; 35, roller; 36, connecting block; 37, pressing block; 4, lateral roller; 5, vertical roller groove; 6, vertical roller; 7, return spring; 71, limit sliding block; 8, guide rod; 9, nest plate positioning plate; 91, nest plate; 911, needle cylinder; 10, nest plate placement area. DETAILED DESCRIPTION

[0042] The present application will now be described with reference to the accompanying schematic drawings, in which the preferred embodiments of the present application are shown. It should be understood, however, that the application is not limited to the preferred embodiments presented herein and many modifications can be made by a person skilled in the art without departing from the scope of the present application. The following description is therefore to be understood as an illustration of the broadest possible interpretation of the present application and not as a limitation of the present application.

[0043] The serial numbers of components in the present application, such as "first", "second", etc., are used only to distinguish the described objects and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0044] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be 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, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0045] The application will be described in greater detail in the following paragraphs with reference to the attached drawings. The advantages and features of the present application will become more apparent from the following description in conjunction with the drawings. It is to be understood that the drawings are in a highly simplified form and are not to precise scale, only for the purpose of facilitating the understanding of the embodiments of the present application.

[0046] As shown in Figures 1-4 , since the nest plate 91 is made of plastic material, it will appear to be concave in the middle and high around. When the glass needle cylinder 911 is placed in these deformed nest plates 91, it will appear to be not straight, which seriously affects the normal operation of the downstream needle cylinder 911 taking mechanism. As shown in Figure 4 , the nest plate 91 is corrected by the nest plate correction and positioning mechanism provided in the embodiment, which solves the problem of deformation of the nest plate 91.

[0047] The embodiment of the present application provides a nest plate correction and positioning mechanism, as shown in Figures 5-6 , comprising a bottom plate 1, a straight cam 2 arranged on the bottom plate 1, a pressing mechanism 3 and a nest plate positioning plate 9 arranged on the bottom plate 1.

[0048] The bottom plate 1 serves as the basic support platform of the entire mechanism. The straight cam 2 and the nest plate positioning plate 9 are arranged on the bottom plate 1, and the pressing mechanism 3 comprises a pressing block 37 in transmission connection with the straight cam 2. The horizontal movement of the straight cam 2 drives the pressing block 37 to rise and fall, thereby realizing the pressing or releasing of the nest plate placed on the nest plate positioning plate 9.

[0049] In a specific example, the pressing mechanism 3 is provided with four groups, which are respectively located at the four corner portions of the nest plate 91 and symmetrically arranged around the nest plate positioning plate 9. This arrangement can ensure that the nest plate 91 is uniformly stressed and avoid deflection during pressing.

[0050] As shown in Figures 7-10 , each group of the pressing mechanism 3 further comprises:

[0051] A support block 31 is fixed on the bottom plate 1, and one end of the pressing block 37 is in rotary connection with the top of the support block 31.

[0052] An L-shaped transition block 34 is installed with a roller 35 at the lower end and in rotary connection with the support block 31 at the upper end, and the roller 35 is in rolling contact with the upper surface of the straight cam 2.

[0053] A connecting block 36 is hingedly connected with the pressing block 37 and the L-shaped transition block 34 at both ends.

[0054] A tension spring 33 is connected with the support block 31 at one end and with the connecting block 36 at the other end.

[0055] Further, please continue to refer to Figures 9-10 , the support block 31 includes a first support block and a second support block arranged opposite to each other, both of which are fixed on the bottom plate 1, and the straight line cam 2 passes through the gap between the first support block and the second support block.

[0056] Further, it also includes a tension spring fixing shaft 32 arranged on the first support block, and one end of the tension spring 33 is connected with the tension spring fixing shaft 32.

[0057] Further, please continue to refer to Figures 7-8 , the upper surface of the straight line cam 2 is provided with an inclined surface, which cooperates with the roller 35 of the pressing mechanism 3, for converting the horizontal movement of the straight line cam 2 into the vertical movement of the pressing block 37.

[0058] In a specific example, the inclined surface can be designed with a suitable inclination angle according to actual needs to obtain an ideal pressing force.

[0059] Further, in order to ensure the stability of the horizontal movement of the straight line cam 2, the structure provided by the present application further includes a lateral roller 4 installed on the bottom plate 1 and in contact with the side surface of the straight line cam 2 when it moves.

[0060] In a specific example, the lateral roller 4 can be made of wear-resistant material to prolong the service life.

[0061] Further, the present application also includes a vertical roller assembly, including a vertical roller groove 5 fixed on the bottom plate 1, and a vertical roller 6 installed on the straight line cam 2.

[0062] Specifically, the vertical roller 6 rolls in the vertical roller groove 5 for guiding the horizontal movement of the straight line cam 2.

[0063] The arrangement of the vertical roller assembly further improves the smoothness of the movement of the straight line cam 2.

[0064] In the present embodiment, in order to realize the automatic reset function, a reset assembly is arranged on both sides of the straight line cam 2, which drives the straight line cam 2 to reset in the horizontal direction after the pressing action is completed.

[0065] The reset assembly comprises a guide rod 8, a reset spring 7 and a limiting sliding block 71, the guide rod 8 is fixedly arranged on the bottom plate 1, the reset spring 7 is sleeved on the guide rod 8, the limiting sliding block 71 is fixed at one end on the linear cam 2 and sleeved at the other end on the guide rod 8, and the reset spring 7 is compressed or recovered along with the horizontal movement of the linear cam 2. After the linear cam 2 completes the compression action, the reset assembly can drive it to automatically reset in the horizontal direction.

[0066] Further, the nest plate positioning plate 9 surrounds the nest plate placing area 10, and the nest plate positioning plate 9 is provided with a chamfer corresponding to the pressing block 37 at the edge of the nest plate placing area 10, so that the pressing blocks 3-7 can stably contact the edge of the nest plate.

[0067] Further, the nest plate placing area 10 is provided with a plurality of through holes, and the arrangement mode of the through holes corresponds to the positions of the needle cylinders 911 on the nest plate 91. This design facilitates the observation of the placement state of the needle cylinder 911 and facilitates the subsequent process.

[0068] In actual work process, the working principle of the present application is as follows:

[0069] The linear cam 2 moves in the horizontal direction to the direction close to the bottom plate 1 under the action of external force, and in the movement process, the inclined surface on the upper surface of the linear cam 2 is in rolling contact with the rollers on the L-shaped transition block 34, so that the L-shaped transition block 34 is lifted. Since the L-shaped transition block 34 is hingedly connected with the pressing block 37 through the connecting block 36, the pressing block 37 is lifted upward. At the same time, the four corner pressing mechanisms 3 are all lifted, and the whole mechanism is in an open state; at this time, the reset spring 7 is compressed; the nest plate 91 with the needle cylinder 911 is placed from top to bottom into the nest plate placing area 10 surrounded by the nest plate positioning plate 9.

[0070] After the nest plate 91 is placed, the linear cam 2 moves away from the bottom plate 1 under the action of external force. At this time, since the rollers on the L-shaped transition block 34 roll downward along the inclined surface on the upper surface of the linear cam 2, the tension of the tension spring 33 in the pressing mechanism 3 will drive the connecting block 36, so that the pressing block 37 moves downward and presses the four corner parts of the nest plate 91. In this process, the reset springs 7 on both sides rebound along the guide rods 8 until the linear cam 2 returns to the initial position.

[0071] In addition, during the whole movement process, the lateral rollers 4 and the vertical rollers 6 ensure the smoothness of the linear cam 2 in the horizontal movement process and prevent jamming.

[0072] In summary, the present application has the beneficial effects that the accurate positioning and effective correction of the nest plate are realized by the straight-line cam driving the pressing mechanism, the problem of difficult needle cylinder taking and placing caused by the deformation of the nest plate is solved, the uniform distribution of the pressing force is ensured by the symmetrical arrangement of the multiple sets of pressing mechanisms, the automatic reset function of the mechanism is realized by the setting of the reset assembly, the overall structure is simple and compact, the operation is convenient, and the work is reliable.

[0073] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A nest plate alignment and positioning mechanism, characterized by, The utility model relates to a nest plate pressing device, which comprises: a base plate; a straight cam arranged on the base plate; a pressing mechanism comprising a pressing block, a supporting block, an L-shaped transition block, a connecting block and a tension spring in transmission connection with the straight cam; the supporting block is fixed on the base plate, one end of the pressing block is in rotary connection with the top of the supporting block; the lower end of the L-shaped transition block is provided with a roller, the upper end is in rotary connection with the supporting block, and the roller is in rolling contact with the upper surface of the straight cam; the two ends of the connecting block are respectively hinged with the pressing block and the L-shaped transition block; one end of the tension spring is connected with the supporting block, and the other end is connected with the connecting block; and a nest plate positioning plate arranged on the base plate. The horizontal movement of the straight cam drives the pressing block to lift to realize the pressing or releasing of the nest plate placed on the nest plate positioning plate.

2. The nest plate alignment and positioning mechanism of claim 1, wherein, The pressing mechanism is provided with four groups, which are respectively located at the four corner portions of the nest plate and symmetrically arranged around the nest plate positioning plate.

3. The nest plate alignment and positioning mechanism of claim 1, wherein, The supporting block comprises oppositely arranged first and second supporting blocks, and the first and second supporting blocks are both fixed on the base plate, and the straight cam passes through the gap between the first and second supporting blocks.

4. The nest plate alignment and positioning mechanism of claim 3, wherein, The utility model further comprises a tension spring fixing shaft arranged on the first supporting block, and one end of the tension spring is connected with the tension spring fixing shaft.

5. The nest plate alignment and positioning mechanism of claim 1, wherein, The upper surface of the straight cam is provided with an inclined surface, which cooperates with the roller of the pressing mechanism to convert the horizontal movement of the straight cam into the vertical movement of the pressing block.

6. The nest plate alignment and positioning mechanism of claim 1, wherein, The utility model further comprises a lateral roller installed on the base plate and in contact with the side surface of the straight cam during the movement of the straight cam.

7. The nest plate alignment and positioning mechanism of claim 1, wherein, The utility model further comprises a vertical roller assembly comprising a vertical roller groove fixed on the base plate and a vertical roller installed on the straight cam; the vertical roller rolls in the vertical roller groove to guide the horizontal movement of the straight cam.

8. The nest plate alignment and positioning mechanism of claim 1, wherein, The utility model further comprises a reset assembly arranged on the two sides of the straight cam respectively, which drives the straight cam to reset in the horizontal direction after the pressing action is completed.

9. The nest plate alignment and positioning mechanism of claim 8, wherein, The reset assembly comprises: a guide rod fixedly arranged on the base plate; a reset spring sleeved on the guide rod; and a limiting sliding block, one end of which is fixed on the straight cam, and the other end is sleeved on the guide rod, which compresses or restores the reset spring with the movement of the straight cam.

10. The nest plate alignment and positioning mechanism of claim 1, wherein, The nest plate positioning plate surrounds a nest plate placing area, and is provided with a chamfer corresponding to the pressing block at the edge of the nest plate placing area.

11. The nest plate alignment and positioning mechanism of claim 10, wherein, The nest plate placing area is provided with a plurality of through holes, and the arrangement mode of the through holes corresponds to the position of the needle cylinder on the nest plate.

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