Infusion pump PCA key device

Abstract

The utility model relates to the technical field of medical instruments, in particular to an infusion pump PCA (Principal Component Analysis) key device which comprises a shell and a pressing plate, rotating shafts extend outwards from the two sides of one end of the pressing plate, hole grooves used for assembling the rotating shafts are formed in the shell, the rotating shafts are connected with the hole grooves in a matched mode, and an elastic piece is fixed on one side, close to the shell, of the pressing plate. A supporting cross beam is arranged on the shell corresponding to the elastic piece, and the end part of the elastic piece abuts against the supporting cross beam; a pressing block is arranged at one end of the pressing plate, the pressing block and the elastic piece are located on the same side of the pressing plate, and the elastic piece and the pressing block are located on the two sides of the rotating shaft respectively. According to the infusion pump PCA key device, rotation is achieved after the rotating shaft is matched with the hole groove, resetting of the pressing plate can be achieved through reasonable design and fixing of the elastic piece, the rotating shaft does not need to be sleeved with a torsional spring, the assembling process is greatly simplified, the assembling complexity is reduced, and the assembling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a PCA button device for an infusion pump. Background Technology

[0002] In existing technologies, the PCA button for infusion pumps has a cutout area on the housing, with a press plate positioned in that area. It is rotatably connected to the housing via a rotating shaft, and a torsion spring is fitted onto the shaft. The compression of the torsion spring at both ends presses against the housing, allowing the press plate to return to its original position after being pressed. This type of PCA button for infusion pumps is difficult to assemble and has low production efficiency. Utility Model Content

[0003] To address the aforementioned technical shortcomings, this invention provides a PCA button device for an infusion pump, which simplifies the assembly process and improves assembly efficiency.

[0004] This utility model discloses a PCA button device for an infusion pump, including a housing and a pressing plate. Rotary shafts extend outward from both sides of one end of the pressing plate. A slot is provided inside the housing for assembling the rotating shafts, which are connected to the slots. An elastic element is fixed to the pressing plate near the housing. A supporting beam is provided on the housing at the location corresponding to the elastic element, with the end of the elastic element abutting against the supporting beam. A holding block is provided at one end of the pressing plate, located on the same side as the elastic element, and the elastic element and the holding block are respectively located on opposite sides of the rotating shafts.

[0005] The elastic element is made of bent steel wire and includes a first rod, a second rod, a third rod, a fourth rod, and a fifth rod. The first rod, the second rod, and the third rod are in the same plane, and the third rod, the fourth rod, and the fifth rod are in the same plane, with an angle between the two planes. The first rod, the second rod, and the third rod are fixed to the pressing plate, and the fifth rod abuts against the supporting beam.

[0006] A fixing block is provided on the pressing plate, and an insertion hole is provided on the fixing block. The first rod is inserted into the insertion hole. The pressing plate is provided with grooves corresponding to the second rod and the third rod. A locking block is provided at intervals on the groove. The second rod and the third rod are fixedly locked into the groove by the locking block.

[0007] Mounting grooves are provided on the sides of the holes and slots on the housing. The maximum width between two holes and slots is greater than or equal to the maximum width distance between the ends of two rotating shafts. The maximum width between mounting grooves is greater than the maximum width between holes and slots. The mounting grooves and holes and slots are partially connected.

[0008] The portion of the supporting beam that abuts against the fifth rod is a plane, and the central axis of the rotating shaft lies within this plane.

[0009] The PCA button device for an infusion pump obtained by this utility model achieves rotation through the cooperation of a rotating shaft and a slot, and is fixed by a reasonable design of an elastic element, which can realize the reset of the pressing plate. There is no need to attach a torsion spring to the rotating shaft, which greatly simplifies the assembly process, reduces the complexity of assembly, and improves assembly efficiency.

[0010] The PCA button device for an infusion pump obtained by this utility model has a plug-in connection between the pressing plate and the elastic element, and the elastic element is pressed into the groove. The assembly is simple and convenient, and provides a basis for realizing automated assembly. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the shell of this utility model;

[0013] Figure 3 This is a perspective view of the housing of this utility model;

[0014] Figure 4 This is a schematic diagram of the connection structure between the pressing plate and the elastic element of this utility model;

[0015] Figure 5 This is a schematic diagram of the pressing plate of this utility model;

[0016] Figure 6 This is a front structural diagram of the present invention;

[0017] Figure 7 for Figure 6 A schematic diagram of the cross section of AA. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Example 1:

[0020] like Figure 1 , Figure 4As shown, this utility model discloses a PCA button device for an infusion pump, including a housing 1 and a pressing plate 2. Rotating shafts 3 extend outward from both sides of one end of the pressing plate 2. A slot 8 for assembling the rotating shafts 3 is provided inside the housing 1, and the rotating shafts 3 are connected to the slots 8. An elastic element 5 is fixed on the pressing plate 2 near the housing 1. A supporting beam 7 is provided on the housing 1 at the location corresponding to the elastic element 5, and the end of the elastic element 5 abuts against the supporting beam 7. A holding block 4 is provided at one end of the pressing plate 2, and the holding block 4 and the elastic element 5 are located on the same side of the pressing plate 2, with the elastic element 5 and the holding block 4 located on opposite sides of the rotating shaft 3.

[0021] Normally, the housing 1 has a hollow area 6, and the pressing plate 2 is set within this hollow area 6. Grooves 8 are provided on the side walls of the housing 1 on both sides of one end of the hollow area 6, and outwardly extending rotating shafts 3 are provided on both sides of one end of the pressing plate 2. The grooves 8 are slot-shaped structures with openings on the inner side of the housing 1. Since the elastic element 5 is set on the pressing plate 2, it is not necessary to attach a torsion spring to the rotating shaft 3 as in the prior art. Thus, during assembly, the pressing plate 2 is simply tilted and passed through the hollow area 6 through the housing 1, and after returning to its original position, the rotating shaft 3 is slid into the corresponding groove 8, greatly improving assembly efficiency. A support beam is provided on the housing 1 at the location corresponding to the elastic element 5, so the elastic element 5 is positioned between the support beam and the pressing plate 2. Therefore, its assembly process does not interfere with the fit between the rotating shaft 3 and the groove 8, greatly improving assembly efficiency.

[0022] The clamping block 4 is used to clamp the conduit in conjunction with the shell 1. It is a known existing structure and will not be described in detail here.

[0023] like Figure 4As shown, the elastic element 5 is constructed from bent steel wire and includes a first rod 51, a second rod 52, a third rod 53, a fourth rod 54, and a fifth rod 55. The first rod 51, second rod 52, and third rod 53 are in the same plane, as are the third rod 53, fourth rod 54, and fifth rod 55, with the two planes forming an angle. The first rod 51, second rod 52, and third rod 53 are fixed to the pressing plate 2, and the fifth rod 55 abuts against the supporting beam 7. The first rod 51, second rod 52, third rod 53, fourth rod 54, and fifth rod 55 are formed by bending steel wire and constitute a single integrated structure. Because the first rod 51, second rod 52, and third rod 53 are in one plane, and the third rod 53, fourth rod 54, and fifth rod 55 are in another plane, the two planes form an angle and intersect at the third rod 53. Therefore, when the first rod 51, the second rod 52, and the third rod 53 are fixed to the pressing plate 2, and the fifth rod 55 abuts against the supporting beam 7, there is a certain gap between the supporting beam 7 and the pressing plate 2. After pressing, the steel wire has the ability to return to its original position, maintaining the gap between the pressing plate 2 and the supporting beam 7. This type of elastic element 5 has strong deformation capability during pressing, and can keep the elastic element 5 in the same plane at most, thus not affecting the maximum pressing stroke of the pressing plate 2 and improving the performance.

[0024] like Figure 5 As shown, a fixing block 12 is provided on the pressing plate 2, and an insertion hole 13 is provided on the fixing block 12. The first rod 51 is inserted into the insertion hole 13. The pressing plate 2 is provided with grooves 10 corresponding to the second rod 52 and the third rod 53. A locking block 11 is provided at intervals on the groove 10. The second rod 52 and the third rod 53 are fixedly locked into the groove 10 by the locking block 11.

[0025] A fixing block 12 is provided on the pressing plate 2. The fixing block 12 can be located at one end near the rotating shaft 3. An insertion hole 13 is provided on the side wall of the fixing block 12. During assembly, it is only necessary to insert the first rod 51 of the elastic member 5 into the insertion hole 13. After it is inserted into place, the second rod 52 and the third rod 53 correspond exactly to the groove 10. Then, the elastic member 5 is rotated around the first rod 51, so that the second rod 52 and the third rod 53 are engaged in the groove 10. Furthermore, a locking block 11 is provided on the pressing plate 2 at the edge of the groove 10, so that after the second rod 52 and the third rod 53 are engaged in the groove 10, the locking block 11 will restrict them inside and prevent them from easily coming out. During use, the connection between the elastic member 5 and the pressing plate 2 is firm and stable.

[0026] The connection between this type of elastic element 5 and the pressing plate 2 is simpler and more convenient. It only requires inserting the first rod 51 into the insertion hole 13, and then rotating the elastic element 5 around the first rod 51 to press it into the groove 10. This assembly method is simple and efficient. This simple operation provides a foundation for automated assembly; if automated assembly is adopted, assembly efficiency will be greatly improved.

[0027] like Figure 2 , Figure 3 As shown, mounting grooves 9 are provided on the sides of the holes and grooves 8 on the housing 1. The maximum width between two holes and grooves 8 is greater than or equal to the maximum width distance between the ends of two rotating shafts 3. The maximum width between mounting grooves 9 is greater than the maximum width between holes and grooves 8. The mounting grooves 9 and holes and grooves 8 are partially connected.

[0028] Since the pivots 3 on both sides of the pressing plate 2 protrude from the pressing plate 2, and the cutout area 6 on the housing 1 is basically the same size as the mounting plate, the pressing plate 2 needs to be tilted to allow it to pass through the cutout area 6. However, for tight assembly, the width of the cutout area 6 is not much larger than the distance between the pivots 3 on both sides of the pressing plate 2. Therefore, when the pressing plate 2 is straightened, interference can easily occur, affecting the sliding of the pivots 3 into the slot 8, increasing the assembly difficulty. However, mounting slots 9 are provided on the side of the slot 8, with a larger distance between them. Therefore, during assembly, it is only necessary to first align the pivots 3 with the mounting slots 9 and then tilt and insert the pressing plate 2. After insertion, the pivots 3 correspond to the mounting slots 9. Because the distance between the mounting slots 9 is larger, there will be no interference between the mounting slots 9 and the pivots 3 when the pressing plate 2 is straightened. The pressing plate 2, straightened within the mounting slots 9, can then be moved into the slot 8. Since the mounting groove 9 and the hole groove 8 are connected at one end inside the housing 1, and the width of the connection is equal to the width between the hole grooves 8, but the area near the bottom of the hole groove 8 and the mounting groove 9 is not connected, i.e., there is a blocking protrusion. Therefore, after the pressing plate 2 is straightened in the mounting groove 9, the rotating shaft 3 on the pressing plate 2 can move from the top position of the mounting groove 9, i.e., the position connected to the hole groove 8, into the hole groove 8, and then slide to the bottom of the hole groove 8, thus connecting the pressing plate 2 to the housing 1. The operation is simple and convenient, and the assembly efficiency is high.

[0029] Example 2:

[0030] like Figure 6 , Figure 7 As shown, this utility model discloses an infusion pump PCA button device, which differs from Embodiment 1 in that: the part on the supporting beam 7 that abuts against the fifth rod 55 is a plane, and the central axis of the rotating shaft 3 is located within the plane.

[0031] During the pressing and rebounding process of the pressing plate 2, the fifth rod 55 of the elastic element 5 abuts against the supporting beam 7, but relative sliding can occur. Therefore, the part of the supporting beam 7 that abuts the fifth rod 55 is made into a plane. This reduces the friction between the supporting beam 7 and the fifth rod 55 during sliding, making the compression and recovery process of the elastic element 5 stable and smooth. Furthermore, this plane coincides with the central axis of the rotating shaft 3, meaning the central axis of the rotating shaft 3 lies on this plane. This reduces the torque generated by the friction between the fifth rod 55 and the supporting beam 7, further ensuring smoother and more stable pressing and rebound of the pressing plate 2.

[0032] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A PCA button device for an infusion pump, comprising a housing and a pressing plate, characterized in that: A rotating shaft extends outward from both sides of one end of the pressing plate. A slot for assembling the rotating shaft is provided inside the housing. The rotating shaft is connected to the slot. An elastic element is fixed on the pressing plate near the housing. A support beam is provided on the housing at the location corresponding to the elastic element. The end of the elastic element abuts against the support beam. A holding block is provided at one end of the pressing plate. The holding block and the elastic element are located on the same side of the pressing plate, and the elastic element and the holding block are located on opposite sides of the rotating shaft.

2. The PCA button device for an infusion pump according to claim 1, characterized in that: The elastic element is made of bent steel wire and includes a first rod, a second rod, a third rod, a fourth rod, and a fifth rod. The first rod, the second rod, and the third rod are in the same plane, and the third rod, the fourth rod, and the fifth rod are in the same plane, with an angle between the two planes. The first rod, the second rod, and the third rod are fixed to the pressing plate, and the fifth rod abuts against the supporting beam.

3. The PCA button device for an infusion pump according to claim 2, characterized in that: in A fixing block is provided on the pressing plate, and an insertion hole is provided on the fixing block. The first rod is inserted into the insertion hole. The pressing plate is provided with grooves corresponding to the second rod and the third rod. A locking block is provided at intervals on the groove. The second rod and the third rod are fixedly locked into the groove by the locking block.

4. The PCA button device for an infusion pump according to claim 1, characterized in that: Mounting grooves are provided on the sides of the holes and slots on the housing. The maximum width between two holes and slots is greater than or equal to the maximum width distance between the ends of two rotating shafts. The maximum width between mounting grooves is greater than the maximum width between holes and slots. The mounting grooves and holes and slots are partially connected.

5. The PCA button device for an infusion pump according to claim 2, characterized in that: The portion of the supporting beam that abuts against the fifth rod is a plane, and the central axis of the rotating shaft lies within this plane.

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