Pre-buckling mechanism for upper pen shell assembly and lower pen shell assembly
By designing the pre-retardation mechanism of the upper and lower pen shell assembly, the sliding guide members and clamp components are used to achieve accurate assembly of the injection pen, which solves the problems of inaccurate positioning and low production efficiency during the assembly process of traditional injection pens, and improves the sealing and reliability of the product.
Patent Information
- Application Number
- CN202421468647.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-26
AI Technical Summary
During the assembly process, traditional injection pens are prone to inaccurate positioning, difficult assembly, and the need for additional tools or operations, resulting in damage to the pen housing and low production efficiency.
A pre-retaining mechanism for the upper and lower pen housing assembly is designed, including a support frame, a base, a first clamping mechanism, a second clamping mechanism and a driving mechanism, and the precise alignment and rapid assembly of the upper and lower pen housing assembly is achieved through the sliding guide member and the clamping assembly.
This technical means ensures the precise alignment of the upper and lower pen shell components during assembly, avoids shell damage, improves production efficiency, and ensures the sealing and reliability of the injection pen.
Smart Images
Figure CN222767688U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection pen assembly, in particular to a pre-fastening mechanism of upper and lower pen shell components. Background Art
[0002] An injection pen is a medical device used for convenient and accurate injection of drugs. It is usually used for patients with chronic diseases or those who need frequent self-injections. The injection pen is precisely designed to accurately control the dosage of each injection to avoid waste or overdose.
[0003] Traditional injection pens often face the following problems during the assembly process: difficult assembly, inaccurate positioning, and the need for additional tools or operations to ensure that parts are correctly docked, especially when it comes to the accurate alignment between the upper pen shell assembly and the lower pen shell assembly. If the alignment is inaccurate or deviation occurs, the outer shell of the injection pen will be damaged during the snap-fit, making it unusable. Manual assembly is time-consuming, labor-intensive, and has low production efficiency.
[0004] Therefore, the present application has developed a pre-fastening mechanism for upper and lower pen shell components to solve the problems existing in the prior art. Utility Model Content
[0005] The utility model aims to provide a pre-fastening mechanism for an upper and lower pen shell assembly to solve the problems in the prior art of damage to the injection pen shell due to inaccurate positioning during assembly and low production efficiency caused by manual assembly.
[0006] The technical solution of the utility model is: a pre-fastening mechanism of upper and lower pen shell components, comprising:
[0007] Support frame;
[0008] Base: slidably arranged on the support frame;
[0009] At least one first clamping mechanism: arranged above the base, the first clamping mechanism is provided with a through hole 1, the pen housing assembly is placed in the through hole 1, the first clamping mechanism comprises a first sliding member, a pair of clamping assemblies and a sliding guide member arranged between the first sliding member and the clamping assembly;
[0010] The sliding guide member comprises a guide groove and a guide column, wherein the guide column and the guide groove are respectively arranged on different first sliding members and clamping assemblies; the horizontal movement of the first sliding member along the X-axis direction is converted into the horizontal relative or opposite movement of a pair of clamping assemblies along the Y-axis direction;
[0011] A second clamping mechanism: arranged above the first clamping mechanism and fixed on the support frame, the second clamping mechanism comprises a second through hole, an upper pen housing assembly is arranged in the second through hole, and the second through hole is concentrically arranged with the first through hole in a vertical direction;
[0012] A driving mechanism: arranged above the second clamping mechanism, used for pressing down the upper pen housing assembly, the driving mechanism comprising a moving rod, the moving rod being colinear with the upper pen housing assembly, and the orthographic projection of the moving rod on the upper end surface of the upper pen housing assembly falling within the upper end surface of the upper pen housing assembly.
[0013] Preferably, the guide groove is arranged as a whole along the movement direction of the first sliding member, and the two ends of the guide groove are arranged at a distance in the Y-axis direction.
[0014] Preferably, the guide post is fixed on the upper surface of the clamping assembly and is correspondingly arranged in the guide groove. When the guide post slides in the guide groove, the clamping assembly moves along the Y-axis direction.
[0015] Preferably, when the clamp assembly is clamped on the outer surface of the lower pen housing assembly, the inner side surface of the clamp assembly close to the lower pen housing assembly half surrounds the outer surface of the lower pen housing assembly and matches the shape of the outer surface of the lower pen housing assembly.
[0016] Preferably, the second clamping mechanism further includes a rotating plate and a fixed plate, the fixed plate is fixed on the supporting frame, the rotating plate is rotatably connected to the fixed plate, and the second through hole overlaps with at least a portion of the rotating plate.
[0017] Preferably, a limit plate is provided in the through hole 1 and slides axially along the lower pen shell assembly, and a pair of limit blocks abutting the bottom end of the lower pen shell assembly are provided on the limit plate, and the two limit blocks respectively match the grooves at the bottom end of the lower pen shell assembly and abut against the grooves.
[0018] Preferably, the distance between the two ends of the guide groove along the Y-axis direction is greater than the sliding distance of the clamping assembly.
[0019] Compared with the prior art, the advantages of the utility model are:
[0020] (1) The upper pen housing assembly, the lower pen housing assembly and the moving rod are in the same line, so that the upper and lower pen housings will not be deviated or misaligned during assembly, resulting in damage to the housing;
[0021] (2) By pressing down the driving assembly, the upper pen housing assembly and the lower pen housing assembly can be quickly assembled, thereby improving production efficiency;
[0022] (3) The guide grooves are symmetrically arranged, and the clamping assembly moves in the guide grooves and clamps on both sides of the lower pen shell assembly at the same time, so that the forces on both sides of the lower pen shell assembly are evenly applied. When the lower pen shell assembly is pre-fastened, the lower pen shell assembly will not be offset due to uneven forces, thereby causing damage to the injection pen housing. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0024] Figure 1 It is a structural schematic diagram of a pre-fastening mechanism of an upper and lower pen shell assembly described in the utility model;
[0025] Figure 2 It is a top view of the first clamping mechanism of the utility model;
[0026] Figure 3 This is a schematic structural diagram of the second clamping mechanism of the utility model;
[0027] Figure 4 It is a side sectional view of a pre-fastening mechanism of an upper and lower pen shell assembly of the utility model;
[0028] Figure 5 This is a structural schematic diagram of the bottom end of the lower pen housing assembly and the limiting plate of the utility model;
[0029] Figure 6 It is a schematic diagram of the structure of the upper pen housing assembly and the lower pen housing assembly of the utility model being pre-fastened;
[0030] Figure 7 This is a schematic diagram of the clamping structure when the lower pen housing assembly of the utility model has a window;
[0031] Figure 8 This is a schematic diagram of the clamping structure of the lower pen housing assembly of the utility model when there is no viewing window.
[0032] Wherein: 1. support frame; 2. base; 3. first clamping mechanism; 31. first sliding member; 32. sliding guide member; 321. guide groove; 322. guide column; 33. clamping assembly; 4. through hole 1; 5. lower pen shell assembly; 6. second clamping mechanism; 61. through hole 2; 62. rotating plate; 63. fixed plate; 7. upper pen shell assembly; 8. driving mechanism; 81. moving rod; 9. limit plate; 91. limit block; 10. groove; 11. window; 12. guide block. DETAILED DESCRIPTION
[0033] The following is a further detailed description of the present invention in conjunction with specific embodiments:
[0034] like Figure 1-Figure 6As shown, a pre-fastening mechanism for upper and lower pen shell assemblies comprises a support frame 1, a base 2, a first clamping mechanism 3, a second clamping mechanism 6, and a driving mechanism 8. A through hole 1 4 is arranged in the first clamping mechanism 3, a lower pen shell assembly 5 is placed in the through hole 1 4, and a limit block 91 abutting against the bottom of the lower pen shell assembly 5 is arranged below the lower pen shell assembly 5, so as to prevent the lower pen shell assembly 5 from being offset and rotating under force. The first clamping mechanism 3 comprises a first sliding member 31, a sliding guide member 32 and a clamping assembly 33. The sliding guide member 32 comprises a guide groove 321 and a guide column 322. The first sliding member 31 slides on the first clamping mechanism 3, and the clamping assembly 33 is driven to slide in the guide groove 321 through the guide column 322, and clamps the lower pen shell assembly 5. A through hole 2 61 is arranged in the second clamping mechanism 6, and an upper pen shell assembly 7 is arranged in the through hole 2 61. Under the action of a moving rod 81 in the driving mechanism 8, the moving rod 81 is pressed downward to complete the assembly of the upper pen shell assembly 7 and the lower pen shell assembly 5.
[0035] In this embodiment, the X-axis direction is set as the movement direction of the first sliding member 31, and the Y-axis direction is along the radial direction of the through hole 4 and perpendicular to the X-axis direction. A pair of guide grooves 321 are symmetrically arranged on both sides of the through hole 4, and the length direction of the guide grooves 321 is the same as the movement direction of the first sliding member 31. Preferably, a pair of guide grooves 321 are symmetrically arranged on both sides of the first sliding member 31. When the guide grooves 321 move, they can provide a more stable movement trajectory and path, which helps the clamping assembly 33 to move in a predetermined direction and speed, thereby improving the accuracy and controllability of the movement. Furthermore, the two ends of the guide grooves 321 are in the Y-axis direction. There is a spacing upwards, so that when the first sliding member 31 moves, the clamping assembly 33 can move in the Y-axis direction. When the first sliding member 31 slides, the two guide pillars 322 slide in the corresponding guide grooves 321 and drive the two clamping assemblies 33 to move along the Y-axis direction at the same time, and clamp on both sides of the lower pen shell assembly 5 at the same time, so that the two sides of the lower pen shell assembly 5 are evenly stressed, and the pen shell will not be unable to be completely closed or require greater force to be buckled due to uneven stress on the lower pen shell assembly 5. The uneven stress will cause wear or damage to the upper pen shell assembly 7 or the lower pen shell assembly 5 when buckled, thereby reducing its service life or reliability.
[0036] Furthermore, if Figure 3 As shown, the second clamping mechanism 6 includes a rotating plate 62 and a fixed plate 63, one end of the rotating plate 62 is rotatably connected to the fixed plate 63, and the other end of the rotating plate 62 is rotated away from the fixed plate 63, so as to facilitate the placement of the upper pen shell assembly 7 in the second through hole 61, and the second through hole 61 at least partially overlaps with the rotating plate 62. When the other end of the rotating plate 62 is rotated onto the fixed plate 63, the inner side surface of the rotating plate 62 partially overlaps with the second through hole 61 and matches with the outer surface of the upper pen shell assembly 7. The rotation of the rotating plate 62 can not only facilitate the installation of the upper pen shell assembly 7 in the second through hole 61, but also can clamp the upper pen shell assembly 7 and the lower pen shell assembly 5 for press-fit matching.
[0037] Specifically, through hole one 4 and through hole two 61 are concentrically arranged in the vertical direction, and the lower pen shell assembly 5 and the upper pen shell assembly 7 are respectively arranged in through hole one 4 and through hole two 61, so that the lower pen shell assembly 5 and the upper pen shell assembly 7 are in the same straight line. When buckled, the lower pen shell assembly 5 and the upper pen shell assembly 7 are accurately aligned, and the pen shell will not be damaged due to deviation. In addition, the accurate alignment of the pen shell can ensure that the injection pen is in a completely sealed state when not in use, effectively preventing the drug in the injection pen from leaking or being contaminated by the outside, ensuring the safety and reliability of the injection pen during injection, and also ensuring the stability and durability of the equipment in long-term use.
[0038] Furthermore, if Figure 1-Figure 4 As shown, the orthographic projection of the moving rod 81 on the upper end surface of the upper pen shell assembly 7 falls within the upper end surface of the upper pen shell assembly 7. When the driving assembly drives the moving rod 81 to press down and apply force to the upper pen shell assembly 7, the end surface of the moving rod 81 falls entirely on the upper end surface of the upper pen shell assembly 7, rather than partially on the upper end surface of the upper pen shell assembly 7, resulting in force on one side of the upper pen shell assembly 7. When the upper pen shell assembly 7 is buckled, the pressure on one side of the upper pen shell assembly 7 is large, and the pressure on the other side is small. Excessive pressure on one side will make it difficult for the upper pen shell assembly 7 to buckle on that side. Conversely, the small pressure on the other side will cause that side to be unable to be completely closed, so that the upper pen shell assembly 7 and the lower pen shell assembly 5 may only be partially buckled or cannot be buckled at all, which will affect the normal use and sealing performance of the product, and even due to the large pressure on one side, it may cause plastic deformation or cracks in the material, thereby affecting the reliability of the buckling and the structural integrity of the pen shell.
[0039] In one embodiment, if Figure 7 As shown, strip windows 11 are respectively provided on both sides of the outer surface of the lower pen shell assembly 5, and the inner side surface of the corresponding clamping assembly 33 is provided with a guide block 12 matching the strip window 11. When the clamping assembly 33 is clamped on the lower pen shell assembly 5, the two guide blocks 12 are plugged into the corresponding strip windows 11, and the inner side surface of the clamping assembly 33 matches the outer surface shape of the lower pen shell assembly 5. Through the plugging of the guide blocks 12 and the strip window 11 and the matching and fitting of the two surfaces, when the upper pen shell assembly 7 is buckled with the lower pen shell assembly 5, the lower pen shell assembly 5 will not be offset in the radial direction of the through hole 4.
[0040] In another embodiment, Figure 8 As shown, the lower pen housing assembly 5 has no viewing window 11, the inner side surfaces of the two clamping assemblies 33 are half-surrounded by the outer surface of the lower pen housing assembly 5, and the inner side surfaces of the clamping assemblies 33 match the outer surface shape of the lower pen housing assembly 5. The outer surface of the lower pen housing assembly 5 is but not limited to a curved surface, a single plane or multiple planes. Preferably, the outer surface of the lower pen housing assembly 5 is a curved surface to ensure that the pressure on the lower pen housing assembly 5 is uniform when clamping, thereby enhancing the firmness of the clamping.
[0041] like Figure 2 As shown, in order to enable the clamping assembly 33 to clamp on both sides of the lower pen shell assembly 5 and tighten, the distance between the two ends of the guide groove 321 along the movement direction of the clamping assembly 33 is greater than the sliding distance of the clamping assembly 33, thereby preventing the sliding distance of the clamping assembly 33 from being too short, resulting in the clamping assembly 33 being unable to clamp the lower pen shell assembly 5.
[0042] like Figure 5 As shown, in order to further ensure the precise snap fit between the upper pen shell assembly 7 and the lower pen shell assembly 5, two limit blocks 91 are respectively arranged in the groove 10 at the bottom end of the lower pen shell assembly 5 and abut against the groove 10. The two limit blocks 91 can fix the position of the lower pen shell assembly 5, so that when snapping together, the upper pen shell assembly 7 can accurately and stably align with the lower pen shell assembly 5, and can more easily help find the correct snap fit position and complete the snap fit action, which can improve the overall reliability and durability of the product and reduce the risk of failure caused by damage or loosening of the snap fit mechanism.
[0043] The implementation principle of the embodiment of this application:
[0044] When the upper pen shell assembly 7 and the lower pen shell assembly 5 are pre-fastened, two first clamping mechanisms 3 are provided on the base 2. The sliding base 2 moves the first clamping mechanism 3 on the left to the bottom of the second clamping mechanism 6, and the lower pen shell assembly 5 is placed in the first clamping mechanism 3. At this time, the limit block 91 on the limit plate 9 abuts against the bottom end of the lower pen shell assembly 5 to limit the deviation and rotation of the lower pen shell assembly 5, and pulls the first sliding member 31. The movement of the first sliding member 31 drives the movement of the guide groove 321. Because the two ends of the guide groove 321 are in the Y-axis direction, The guide column 322 moves along the Y-axis direction and drives the clamping assembly 33 to move. The two clamping assemblies 33 simultaneously approach and clamp both sides of the lower pen shell assembly 5, and restrict the lower pen shell assembly 5 in the first clamping mechanism 3. Then, the rotating plate 62 is rotated to put the upper pen shell assembly 7 into the second through hole 61, and the rotating plate 62 is rotated to the fixed plate 63 to clamp the upper pen shell assembly 7. The driving assembly is started to move downward, and the moving rod 81 presses down the top of the upper pen shell assembly 7, so that the upper pen shell assembly 7 moves downward and completes the pre-fastening with the lower pen shell assembly 5.
[0045] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.
Claims
1. A pre-fastening mechanism for upper and lower pen shell assemblies, characterized in that: include: Support frame; Base: slidably arranged on the support frame; At least one first clamping mechanism: arranged above the base, the first clamping mechanism is provided with a through hole 1, the pen housing assembly is placed in the through hole 1, the first clamping mechanism comprises a first sliding member, a pair of clamping assemblies and a sliding guide member arranged between the first sliding member and the clamping assembly; the sliding guide member comprises a guide groove and a guide column, the guide column and the guide groove are respectively arranged on different first sliding members and clamping assemblies; the horizontal movement of the first sliding member along the X-axis direction is converted into a horizontal relative or opposite movement of a pair of the clamping assemblies along the Y-axis direction; A second clamping mechanism: arranged above the first clamping mechanism and fixed on the support frame, the second clamping mechanism comprises a second through hole, an upper pen housing assembly is arranged in the second through hole, and the second through hole is concentrically arranged with the first through hole in a vertical direction; A driving mechanism: arranged above the second clamping mechanism, used for pressing down the upper pen housing assembly, the driving mechanism comprising a moving rod, the moving rod being colinear with the upper pen housing assembly, and the orthographic projection of the moving rod on the upper end surface of the upper pen housing assembly falling within the upper end surface of the upper pen housing assembly.
2. The upper and lower pen shell assembly pre-fastening mechanism according to claim 1, characterized in that: The guide groove is arranged as a whole along the moving direction of the first sliding member, and the two ends of the guide groove are arranged at a distance in the Y-axis direction.
3. The upper and lower pen shell assembly pre-fastening mechanism according to claim 1, characterized in that: The guide post is fixed on the upper surface of the clamping assembly and is correspondingly arranged in the guide groove. When the guide post slides in the guide groove, the clamping assembly moves along the Y-axis direction.
4. The upper and lower pen case assembly pre-fastening mechanism according to claim 1, characterized in that: When the clamping assembly is clamped on the outer surface of the lower pen housing assembly, the inner side surface of the clamping assembly close to the lower pen housing assembly half surrounds the outer surface of the lower pen housing assembly and matches the shape of the outer surface of the lower pen housing assembly.
5. The upper and lower pen case assembly pre-fastening mechanism according to claim 1, characterized in that: The second clamping mechanism further comprises a rotating plate and a fixed plate, wherein the fixed plate is fixed on the supporting frame, the rotating plate is rotatably connected to the fixed plate, and the second through hole overlaps with at least a portion of the rotating plate.
6. The upper and lower pen case assembly pre-fastening mechanism according to claim 1, characterized in that: A limit plate is arranged in the through hole 1 and slides axially along the lower pen shell assembly. A pair of limit blocks abutting against the bottom end of the lower pen shell assembly are arranged on the limit plate. The two limit blocks respectively match the grooves at the bottom end of the lower pen shell assembly and abut against the grooves.
7. The upper and lower pen case assembly pre-fastening mechanism according to claim 1, characterized in that: The distance between the two ends of the guide groove along the Y-axis direction is greater than the sliding distance of the clamping assembly.