Linkage type elastic needle ejection device

Abstract

The utility model discloses a linkage type bouncing pin ejection device which comprises an ejection unit, the ejection unit comprises a bouncing pin, a spring, a fixing block and a limiting block, one end of the bouncing pin is connected with the fixing block, the other end of the bouncing pin extends out of the fixing block and is provided with the spring in a sleeved mode, and the other end of the bouncing pin is used for making contact with and ejecting out a product; a limiting block is arranged on one side of the fixing block, a limiting groove corresponding to the limiting block is formed in one side of the fixing block, the limiting block is fixedly connected with the straight ejector, and the limiting block is used for preventing the fixing block from rotating; a sliding groove corresponding to the fixing block is formed in one side of the inclined ejector, an ejection inclined face is arranged at one end of the sliding groove, the side, away from the elastic needle, of the fixing block is connected with the sliding groove in a sliding mode, and a sliding inclined face corresponding to the ejection inclined face is arranged. According to the utility model, the fixed block can be driven to be gradually ejected out along the ejection inclined surface through the backward movement of the existing inclined ejection structure in a linkage manner, and finally, a product is ejected out through the elastic needle, so that the functions of ejection and delayed ejection are realized, and the inclined ejection structure has better practicability.

Description

A linkage-type spring ejection device Technical Field

[0001] This utility model belongs to the technical field of injection mold forming, specifically relating to a linkage-type spring ejection device. Background Technology

[0002] The automotive sub-instrument assembly refers to the control and storage platform located between the driver and passenger seats. It is typically manufactured using injection molding. With the rapid development of the automotive industry, the quality requirements for plastic parts in automotive sub-instrument assemblies are becoming increasingly stringent, necessitating continuous updates and improvements to the injection molding process. During injection molding, the area covered by the sloping tops at both ends of the bumper lacks an ejector pin, and it is difficult to add conventional ejector structures. For example, typically, adding a straight ejector block requires a corresponding U-shaped clearance groove on the sloping top to prevent interference with the straight ejector block during rearward movement. However, considering the strength of the sloping top, too many straight ejector blocks cannot be added, and there is no space to install them too close to the molding area. Therefore, the problem of needing to add ejector pins but finding it difficult to do so urgently needs to be solved. Summary of the Invention

[0003] The purpose of this invention is to provide a linkage-type spring pin ejection device, which uses the backward movement of the inclined ejector to link the movement of the spring pin, thereby achieving the function of ejection and delayed ejection.

[0004] This utility model is mainly achieved through the following technical solutions:

[0005] A linkage-type spring ejector device includes an ejector unit installed between a straight ejector and an inclined ejector. The ejector unit includes a spring, a spring, a fixing block, and a limiting block. One end of the spring is connected to the fixing block, and the other end extends out of the fixing block and is fitted with a spring. The other end of the spring is used to contact and eject the product. A limiting block is provided on one side of the fixing block, and a limiting groove is provided on one side of the fixing block corresponding to the limiting block. The limiting block is fixedly connected to the straight ejector and is used to prevent the fixing block from rotating. A sliding groove is provided on one side of the inclined ejector corresponding to the fixing block. An ejection inclined surface is provided at one end of the sliding groove. The side of the fixing block away from the spring is slidably connected to the sliding groove, and a sliding inclined surface is provided corresponding to the ejection inclined surface.

[0006] To better realize this utility model, the ejection inclined surface further includes a driving inclined surface and a platform surface connected in sequence, wherein the driving inclined surface and the sliding inclined surface are engaged.

[0007] To better realize this utility model, the bottom of the chute is further provided with an inclined bottom surface with a gradually increasing inclination height along the direction opposite to the inclined top movement, and the inclined bottom surface is fitted and connected to the ejection inclined surface.

[0008] To better realize this utility model, the top of the fixing block is provided with a horizontally through mounting groove, and one end of the spring pin is provided with a sliding protrusion corresponding to the mounting groove, and the sliding protrusion is slidably connected to the mounting groove.

[0009] To better realize this utility model, the spring pin is further described as a push rod.

[0010] To better realize this utility model, the depth of the limiting groove is greater than the thickness of the limiting block.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention utilizes the backward motion linkage of an existing inclined ejector structure to drive a fixed block to gradually eject along the ejection slope, ultimately ejecting the product via a spring pin. This achieves both ejection and delayed ejection, essentially a secondary ejection, ensuring the performance of the original design while cleverly realizing a linked ejection effect, thus demonstrating good practicality. The ingenious structure of this invention requires very little space for movement, effectively solving the problem of insufficient space for ejection, and thus has wider applications. Attached Figure Description

[0013] Figure 1 is a structural schematic diagram of the ejector unit and the inclined top;

[0014] Figure 2 is a schematic diagram of the connection structure between the fixed block and the slide groove;

[0015] Figure 3 is a schematic diagram of the ejector unit;

[0016] Figure 4 is the front view of the ejector unit;

[0017] Figure 5 is a top view of the ejector unit;

[0018] Figure 6 is a cross-sectional view of BB in Figure 4;

[0019] Figure 7 is a cross-sectional view of CC in Figure 4;

[0020] Figure 8 is a schematic diagram of the fixed block;

[0021] Figure 9 is a schematic diagram of the bottom structure of the fixing block;

[0022] Figure 10 is a schematic diagram of the linkage ejection principle of this utility model;

[0023] Figure 11 is a schematic diagram of the working state of this utility model;

[0024] Figure 12 is a schematic diagram of the installation state of the present invention.

[0025] Among them: 1-sloping top, 2-pressure strip, 3-ejection unit, 4-spring pin, 5-spring, 6-fixing block, 7-limiting block, 8-sliding slope, 9-installation groove, 10-limiting groove, 11-B plate. Detailed Implementation

[0026] Example 1:

[0027] A linkage-type spring ejector device, as shown in Figures 1-3 and 12, includes an ejector unit 3 positioned between an inclined ejector 1 and a straight ejector. The ejector unit 3 comprises a fixing block 6, a limiting block 7, a spring ejector 4, and a spring 5. A groove is provided on one side of the inclined ejector 1 corresponding to the fixing block 6, and an ejector inclined surface is provided at one end of the groove. A sliding inclined surface 8 is provided on one side of the bottom of the fixing block 6. A limiting block 7 is provided on one side of the fixing block 6, and a limiting groove 10 is provided on one side of the fixing block 6 corresponding to the limiting block 7. One end of the spring ejector 4 is connected to the fixing block 6, and the other end extends out of the fixing block 6 and is fitted with the spring 5. The other end of the spring ejector 4 is used to contact and eject the product. Further, as shown in Figure 9, the ejector inclined surface includes a driving inclined surface and a platform surface connected in sequence, and the driving inclined surface engages with the sliding inclined surface 8. As shown in Figure 10, the ejector inclined surface includes a driving inclined surface and a platform surface connected in sequence, and the driving inclined surface engages with the sliding inclined surface 8.

[0028] Preferably, the bottom of the chute is provided with an inclined bottom surface with a gradually increasing inclination height along the direction opposite to the movement of the inclined top 1, and the inclined bottom surface is fitted and connected to the ejection inclined surface.

[0029] Preferably, as shown in Figures 3-7, the top of the fixing block 6 is provided with a horizontally through mounting groove 9, and one end of the spring pin 4 is provided with a sliding protrusion corresponding to the mounting groove 9, and the sliding protrusion is slidably connected to the mounting groove 9.

[0030] As shown in Figure 10, during the use of this utility model, the front and rear molds open, the pin plate ejects, and the inclined ejector 1, guided by the pressure strip 2, moves backward and upward within the slide block. As the inclined ejector 1 moves backward, in the initial movement phase, the ejector unit 3 slides linearly along the inside of the slide block; at this time, the spring pin 4 does not eject. As the inclined ejector 1 continues to move, the bottom inclined surface of the ejector unit 3 slides and connects with the inclined surface at the end of the slide block, and the spring pin 4 is positioned above the inclined surface. As the spring pin 4 moves upward, the ejection function is achieved. When the bottom inclined surface of the ejector unit 3 slides past the inclined surface at the end of the slide block, the ejector unit 3 comes onto the plane of the boss, and the ejection function is completed.

[0031] This invention utilizes the backward motion linkage of the existing inclined ejector 1 structure to drive the fixed block 6 to gradually eject along the ejection inclined surface, ultimately achieving product ejection via the spring pin 4. This realizes both ejection and delayed ejection functions, essentially a secondary ejection, ensuring the performance of the original design structure while cleverly achieving a linked ejection effect, thus possessing good practicality. This invention features an ingenious structure with very small space requirements for structural movement, effectively solving the problem of insufficient space but necessary ejection, and thus has wider applications.

[0032] Example 2:

[0033] A linkage-type spring-loaded ejector device, as shown in Figures 1-10, includes an ejector unit 3, which comprises a spring-loaded pin 4, a spring 5, a fixing block 6, and a limiting block 7. The spring-loaded pin 4 ejects the product; the spring 5 assists in the reset of the spring-loaded pin 4; the fixing block 6 fixes and connects the spring-loaded pin 4, providing a sufficient inclined surface for movement contact. The limiting block 7 simultaneously prevents the fixing block 6 from rotating and limits the spring-loaded pin 4 during reset; that is, during reset, the spring 5 forces the connected spring-loaded pin 4 and fixing block 6 to the position limited by the limiting block 7. Preferably, the spring-loaded pin 4 can be replaced by a standard ejector rod.

[0034] Preferably, the spring pin 4 is made of SKD61 with a hardness of HRC50±2; the spring 5 is a standard part; the limiting block 7 is made of S45C; and the fixing block 6 is made of P20. This structure is commonly used in automotive injection molded products—bumper molds.

[0035] Specifically, as shown in Figure 12, the inclined ejector 1 is installed inside plate B 11. The inclined ejector 1 is ejected as the mold opens. Under the action of the pressure bar 2 and the slide block, the inclined ejector 1 achieves a combined upward and backward movement. The installation structure of the inclined ejector 1 is existing technology and will not be described in detail. The ejection unit 3 is installed between the straight ejector and the inclined ejector 1, as shown in Figure 9. As the mold opens, the movement of the inclined ejector 1 provides power to the ejection unit 3, and the spring pin 4 moves relative to the inclined ejector 1 to achieve the ejection function. First, the front and rear molds open, the pin plate ejects, and the inclined ejector 1, guided by the pressure bar 2, moves backward and upward in the slide block. As the inclined ejector 1 moves backward, in the early purple-red movement segment shown in the figure, the spring pin 4 does not eject. As the inclined ejector 1 continues to move, the spring pin 4 reaches the inclined surface and moves upward, achieving the ejection function. When the spring pin 4 passes the inclined surface and reaches the plane of the boss, the ejection function is completed.

[0036] As shown in Figure 11, the left side represents one end of the bumper product, with the lines indicating the sloping top 1. The red circle indicates the location of the ejector unit 3. The product is visible in the figure as being covered by the sloping top 1. Adding a downward straight top would significantly weaken the strength of the sloping top 1, necessitating the cleverly linked ejector unit 3. This invention utilizes the backward movement of the sloping top 1 to coordinate the movement of the spring pin 4, achieving both ejection and delayed ejection functions, essentially a secondary ejection. This invention features a clever structure, simple manufacturing, and effectively achieves the required ejection function, demonstrating good practicality.

[0037] 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. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A linkage type needle ejecting device characterized by comprising: The ejection unit (3) is installed between the straight ejector and the inclined ejector (1). The ejection unit (3) includes a spring pin (4), a spring (5), a fixing block (6) and a limiting block (7). One end of the spring pin (4) is connected to the fixing block (6), and the other end extends out of the fixing block (6) and is fitted with the spring (5). The other end of the spring pin (4) is used to contact and eject the product. A limiting block (7) is provided on one side of the fixing block (6), and a limiting groove (10) is provided on one side of the fixing block (6) corresponding to the limiting block (7). The limiting block (7) is fixedly connected to the straight ejector, and the limiting block (7) is used to prevent the fixing block (6) from rotating. A sliding groove is provided on one side of the inclined ejector (1) corresponding to the fixing block (6). An ejection inclined surface is provided at one end of the sliding groove. The side of the fixing block (6) away from the spring pin (4) is slidably connected to the sliding groove, and a sliding inclined surface (8) is provided on the ejection inclined surface.

2. The linkage type needle ejecting device according to claim 1, wherein The ejection ramp includes a driving ramp and a platform surface connected in sequence, and the driving ramp is engaged with the sliding ramp (8).

3. The linkage type needle ejecting device according to claim 1 or 2, wherein The bottom of the chute is provided with an inclined bottom surface with a gradually increasing inclination height along the direction opposite to the movement of the inclined top (1), and the inclined bottom surface is connected to the ejection inclined surface.

4. The linkage-type spring pin ejection device according to claim 1, characterized in that, The top of the fixing block (6) is provided with a horizontally through mounting groove (9), and one end of the spring pin (4) is provided with a sliding protrusion corresponding to the mounting groove (9), and the sliding protrusion is slidably connected to the mounting groove (9).

5. A linkage-type spring ejection device according to claim 1 or 4, characterized in that, The spring pin (4) is a push rod.

6. The linkage type needle ejecting device according to claim 1, wherein The depth of the limiting groove (10) is greater than the thickness of the limiting block (7).

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