A split-type armrest base for automobiles and its injection mold

Abstract

This invention discloses a split-type armrest base for automobiles, comprising an armrest base and a pair of armrest covers. Each armrest cover is hinged together via a pivot on the armrest base. The armrest base has a concealing groove for hiding the corners of the armrest covers when opened. The armrest base injection mold includes an upper mold and a lower mold. The upper mold has a spade base, and the lower mold has a front mold tunnel slider that mates with the lower inclined surface of the spade base. The front mold tunnel slider has a molding hole for injection molding one side of the pivot. The armrest base is designed with concealing recesses to hide the covered corners generated when the armrest rotates open, preventing external exposure. The mold structure features a core-pulling design inside the front mold tunnel and a sloping top-pulling design in the secondary slider of the rear mold, achieving integrated injection molding of the opposing pivots and concealing recesses, simplifying the molding process.

Description

Technical Field

[0001] This invention relates to the field of automotive interior technology, and in particular to a split-type armrest base for automobiles and its injection mold. Background Technology

[0002] The armrest box lid of the car is designed with a two-part opening structure. The two halves of the lid flip outwards to open, providing a large opening space for easy access to items. The existing armrest box has the following problems that need to be solved: a) The corners created by the upper cover covering the armrest are obscured after the armrest is opened; b) The gap between the base of the armrest and the upper cover of the armrest needs to be reduced while ensuring that the armrest can be opened normally; c) The injection mold structure of the base of the armrest is suitable for mass production, and the product has no exposed external mold lines.

[0003] For example, patent CN 113276746A discloses a type of enclosed split handrail, including a handrail frame, on which a split cover plate assembly is provided. A skin layer is provided on the cover plate assembly, and a receiving groove is provided at the corner of the cover plate assembly. The edges of the skin layer are engaged in the receiving groove. Each cover plate is hinged to the handrail frame via a set of pivots. Currently, to improve the structural reliability of the pivots, the pivots and the handrail frame are integrally injection molded, which presents certain challenges in injection mold design. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a split-type armrest base for automobiles and its injection mold, so as to achieve the purpose of concealing the corners after the top cover is opened, and to simplify the one-piece molding process.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A split-type armrest base for automobiles includes an armrest base and a pair of armrest covers. The armrest covers on each side are hinged together by a pivot on the armrest base. The armrest base is provided with a concealing groove for hiding the corners of the armrest covers when they are opened.

[0007] The front part of the armrest cover has a reverse arc shape, and the front corner of the armrest cover forms an arc-shaped corner. The shielding groove is a shielding hole that matches the arc-shaped corner.

[0008] The handrail base is provided with a pivot seat, and the pivot is located on the pivot seat. The pivot, the pivot seat and the handrail base are an integral injection molded part.

[0009] Each of the aforementioned pivot seats has a protruding pivot on both sides, with the pivot located at the front of the armrest base corresponding to the shielding groove.

[0010] The edge of the armrest base is provided with an arc-shaped groove that matches the edge of the armrest cover. The curved surface of the arc-shaped groove is set upward, and the shielding groove is located at the front end of the arc-shaped groove.

[0011] An injection mold for a split-type armrest base for automobiles includes an upper mold and a lower mold. The upper mold is provided with a shovel base, and the lower mold is provided with a front mold tunnel slider that cooperates with the lower inclined surface of the shovel base. The front mold tunnel slider is provided with a molding hole for injection molding of one side of the rotating shaft.

[0012] The lower mold is provided with a rear mold main slide block and a hydraulic cylinder for driving the rear mold main slide block to move. The rear mold main slide block is provided with a movable rear mold small slide block, and the inner end of the rear mold small slide block is provided with a protrusion structure for shielding the groove forming.

[0013] The lower part of the upper mold is provided with an inclined guide post, and the small slider of the rear mold is provided with an inclined guide hole that moves in conjunction with the inclined guide post.

[0014] The mating slopes of the rear mold small slider and the rear mold main slider are set upwards from the inside out.

[0015] The rear mold small slider is provided with a movable slider tip. The inner end of the slider tip extends from the inside of the rear mold small slider. The inner end of the slider tip is provided with a mold hole for injection molding of the other side of the rotating shaft. The rear mold main slider is provided with a guide block. The slider tip is provided with a guide groove along the axial direction of the rotating shaft that cooperates with the guide block.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The design of the split armrest base and its injection mold structure is reasonable. The armrest base is designed with a shielding cavity to hide the covered corners generated when the armrest is rotated and opened, avoiding external exposure. The mold structure design uses a core-pulling mechanism inside the front mold tunnel and a tilting top pulled out from the secondary slider of the rear mold, so as to realize the integrated injection molding of the relatively set rotating shaft and the shielding cavity, which is simple to mold. Attached Figure Description

[0018] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0019] Figure 1 and Figure 2 This is a schematic diagram of the split handrail structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the cross-section of the handrail base of the present invention.

[0021] Figure 4 and Figure 5 This is a schematic diagram of the handrail base structure of the present invention.

[0022] Figure 6 This is a simplified structural diagram of the handrail base mold of the present invention.

[0023] Figure 7 and Figure 8 This is a cross-sectional view of the mold opening BB at the rotating shaft seat of the present invention.

[0024] Figure 9 This is a schematic diagram of the DD cross-section of the shielding cavity of the present invention.

[0025] Figures 10 to 12 This is a cross-sectional view (CC) of the mold opening at the rotating shaft of the present invention.

[0026] Figure 13 This is an enlarged schematic diagram of the inclined position of the slider in this invention.

[0027] In the picture:

[0028] 1: Shielding cavity; 2: Upward curved surface; 3: Rotary shaft seat; 4: Rotary shaft; 5: Shovel base; 6: Front mold tunnel slider; 7: Rear mold main slider; 8: Rear mold small slider; 9: Sliding slider ejector; 10: Angled guide post; 11: Hydraulic cylinder; 12: Angled ejector seat; 13: Front mold core; 14: Spring; 15: Handrail base; 16: Handrail cover. Detailed Implementation

[0029] Although the invention has been shown and described herein with reference to specific embodiments, it is not intended to be limited to the details shown. Rather, various modifications in detail may be made within the equivalent scope and scope of the claims without departing from the invention. In the drawings, the same item numbers refer to the same elements.

[0030] Throughout this disclosure, various terms are used to describe the physical shape or arrangement of features. Many of these terms are used to describe features conforming to a cylindrical or generally cylindrical geometry with the feature as its radius and a central axis perpendicular to that radius. Unless otherwise specified, the terms are given the following meanings: The terms “longitudinal,” “longitudinal,” “axial,” and “axial” refer to a direction, dimension, or orientation parallel to the central axis. The terms “radial” and “radially” refer to a direction, dimension, or orientation perpendicular to the central axis. The terms “inward” and “inward” refer to a direction, dimension, or orientation extending radially toward the central axis. The terms “outward” and “outward” refer to a direction, dimension, or orientation extending radially away from the central axis.

[0031] In this specification, relative terms such as “horizontal,” “vertical,” “upward,” “downward,” “top,” and “bottom,” and their derivatives (e.g., “horizontal,” “downward,” “upward,” etc.) should be interpreted as referring to the direction described or the direction shown in the accompanying drawings. These relative terms are for ease of description and are not generally intended to require a specific direction.

[0032] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0033] like Figures 1 to 5 As shown, the car's split armrest base includes an armrest base 15 and a pair of armrest covers. The armrest covers on each side are hinged together by a pivot 4 on the armrest base. The armrest covers can be flipped open outwards. The armrest covers are covered with a skin to form an armrest cover 16. When the pair of armrest covers are flipped open outwards, the space is relatively large, making it easy to take out and put in items.

[0034] The armrest base is provided with a concealing groove for hiding the corner when the armrest cover is opened. Preferably, the front part of the armrest cover has a reverse arc shape, and the front corner of the armrest cover forms an arc-shaped corner. The concealing groove is a concealing cavity 1 that matches the arc-shaped corner.

[0035] This invention employs a design concealing cavity in the split handrail base to hide the exposed corners of the cover when the handrail is rotated open; structurally, an inwardly recessed groove is designed on the side of the handrail base near the handrail cover plate; when the handrail cover is flipped outward, the outer edge of the handrail cover will flip into the groove, and the opening angle of the handrail cover is relatively large.

[0036] The handrail base is equipped with a pivot seat 3, and the pivot is located on the pivot seat. The pivot, pivot seat and handrail base are an integral injection molded part. The entire handrail base is integrally injection molded by injection mold, which makes the structure stable and reliable and the molding process efficient.

[0037] Each side of the handrail base is provided with two pivot seats 3. The pivot seats are outwardly turned boss structures. Each pivot seat has a protruding pivot 4 on both sides. The pair of pivots on both sides of each pivot seat are arranged opposite to each other. The pair of pivots and the pivot seat are integrally injection molded, and the structure is stable and reliable.

[0038] A pivot located at the front of the handrail base is correspondingly set with a shielding groove. The two are close to each other, making molding relatively difficult. This invention uses an injection mold with a mold structure design that uses a core-pulling mechanism inside the tunnel of the front mold and a slanted top pulled out from the secondary slider of the rear mold, so as to achieve the integral injection molding of the pivot and the shielding cavity, which is simple to mold.

[0039] The edge of the armrest base has an arc-shaped groove that mates with the edge of the armrest cover. The curved surface of the arc-shaped groove faces upward, and the concealing groove is located at the front end of the arc-shaped groove. The upward curved surface 2 of the armrest base at the mating point of the split armrest base and the armrest cover ensures that there is no interference when the cover is rotated open, and the visual gap when the cover is closed is small; reducing the gap between the split armrest base and the split armrest covering the cover also ensures that the armrest can be opened normally.

[0040] like Figures 6 to 13As shown, the injection mold for the split armrest base of the car includes an upper mold and a lower mold. The upper mold is provided with a shovel base 5, and the lower mold is provided with a front mold tunnel slider 6 that cooperates with the lower inclined surface of the shovel base. The front mold tunnel slider is provided with a molding hole for injection molding of one side of the rotating shaft.

[0041] The lower die's front die core 13 is provided with a limiting guide structure for restricting the movement direction of the front die tunnel slider. This limiting guide structure can be a guide groove, and the front die tunnel slider can only move axially along the axis of rotation. Figure 11 and Figure 12 As shown, one side of the front mold tunnel slider is engaged with the lower end of the shovel base via an inclined surface, and the other side of the front mold tunnel slider is provided with a compression spring 14. The shovel base moves upward together with the upper mold, and the front mold tunnel slider moves towards the shovel base side under the action of the spring force, thereby realizing the core pulling and forming of one side of the rotating shaft.

[0042] The lower mold is provided with a rear mold main slide block 7 and a hydraulic cylinder 11 for driving the rear mold main slide block to move. The rear mold main slide block is provided with a movable rear mold small slide block 8. The inner end of the rear mold small slide block is provided with a protruding structure for shielding the groove forming. The rear mold main slide block is driven to move outward and retract by the hydraulic cylinder, thereby driving the rear mold small slide block to slide and form together.

[0043] The handrail base and the upper cover are designed with an upward curved surface to ensure that the upper cover does not interfere when it is rotated open, and the visual gap when the upper cover is closed is small. When the small slider of the rear mold moves out, it needs to be tilted upward. For this purpose, the lower part of the upper mold is provided with a slanted guide post 10, which is slanted outward. The small slider of the rear mold is provided with a slanted guide hole that is movable and fits with the slanted guide post. The mating slope of the small slider of the rear mold and the main slider of the rear mold is slanted upward from the inside to the outside.

[0044] When the upper mold moves upward, it drives the inclined guide post to move together. The inclined guide post will drive the small slider of the rear mold to tilt and exit on the sliding inclined surface of the main slider of the rear mold. Since the mating inclined surface of the small slider of the rear mold and the main slider of the rear mold is an upward inclined surface, it moves in conjunction with the main slider of the rear mold to realize the upward forming of the side groove curved surface of the armrest base.

[0045] A pivot located at the front of the armrest base is positioned opposite a concealing groove; their proximity makes molding relatively difficult. Therefore, as... Figure 13 As shown, the rear mold small slider is provided with a movable slider sloping top 9. The inner end of the slider sloping top extends from the inner side of the rear mold small slider. The inner end of the slider sloping top is provided with a mold hole for injection molding of the other side rotating shaft. The sloping top seat 12 on the rear mold main slider is provided with a guide block. The slider sloping top is provided with a guide groove along the axial direction of the rotating shaft that cooperates with the guide block.

[0046] The slider is horizontally inclined. When the small slider of the rear mold moves outward, it will drive the slider to move horizontally along the axis of the rotating shaft. The movement is guided by the cooperation of the guide block and the guide groove, so that the shielding cavity and the nearby rotating shaft are formed together.

[0047] The present invention relates to a car split armrest base and its injection mold structure design, which is reasonable. The armrest base is designed with a shielding cavity to hide the covered corner generated when the armrest is rotated and opened, thus avoiding external exposure. The mold structure design is to use the core pulling inside the tunnel of the front mold and the inclined top pulling in the secondary slider of the rear mold, so as to realize the integrated injection molding of the relatively set rotating shaft and the shielding cavity, which is simple to form.

[0048] Specific structure and molding process of this invention:

[0049] The base of the split armrest has four raised L-shaped pivot seats, each with two protruding circular pivots on both sides, totaling eight pivots for mounting the rotatable armrest cover. For stability during rotation, these four pivots are positioned as close as possible to the four corners of the armrest base. The front part of the armrest near the front row features a reverse-curved corner design. To ensure that the curved corner of the armrest cover is not exposed when rotating, the base armrest has a concealed recess into which the cover rotates to open, making this area invisible.

[0050] The design involves a mold for the handrail base. Two pivot points near the concealed recesses are demolded via a secondary slider and inclined ejector structure, while the other six pivot points are demolded via a front mold tunnel slider. The handrail base and its matching top are designed with a curved surface facing upwards, and the mold utilizes a secondary slider for demolding.

[0051] The entire split handrail module is installed onto the handrail base. The handrail base is fixed to the handrail box via a snap-fit ​​mechanism. The handrail base mold, the front mold tunnel slider is installed inside the front mold via a shovel base and a spring, the rear mold secondary slider, the small slider is on the main slider, and there is also an inclined top between the two small sliders.

[0052] The handrail cover rotates 90° around the handrail base pivot to open and close the handrail; the front mold tunnel slider of the handrail base mold is pulled out of the pivot inside the front mold by the force of the shovel base separating from the T-slot; the secondary slider and the inclined ejector inside the slider of the rear mold of the handrail base mold, firstly the small slider pivot block and the inclined ejector inside the slider simultaneously separate from the pivot of the base, and finally the main slider drives the small slider and the inclined ejector to separate from the product together.

[0053] This invention features a smooth-opening handrail with a reliable structure and an attractive design, while also reducing product cost. Furthermore, it simplifies the number of product molds, making mold processing easier and lowering mold costs, thus achieving stable mass production.

[0054] The above description is merely an illustration of preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0055] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. An injection mold for a split-type armrest base for automobiles, the split-type armrest base including an armrest base and a pair of armrest covers, the armrest covers on each side being hinged together by a pivot on the armrest base, the armrest base being provided with a concealing groove for hiding the corner of the armrest cover when it is opened; the front part of the armrest cover has a reverse arc-shaped structure, the front corner of the armrest cover forms an arc-shaped corner, and the concealing groove is a concealing cavity adapted to the arc-shaped corner; The injection mold includes an upper mold and a lower mold, characterized in that: The upper mold is provided with a shovel base, and the lower mold is provided with a front mold tunnel slider that cooperates with the lower inclined surface of the shovel base. The front mold tunnel slider is provided with a molding hole for injection molding of one side of the rotating shaft. The lower mold is provided with a rear mold main slide block and a hydraulic cylinder for driving the rear mold main slide block to move. The rear mold main slide block is provided with a movable rear mold small slide block. The inner end of the rear mold small slide block is provided with a protrusion structure for shielding the groove forming. The lower part of the upper mold is provided with an inclined guide post. The rear mold small slide block is provided with an inclined guide hole that movably cooperates with the inclined guide post. The mating inclined surfaces of the rear mold small slide block and the rear mold main slide block are inclined upward from the inside to the outside. The rear mold small slide block is provided with a movable slider inclined top. The inner end of the slider inclined top extends from the inside of the rear mold small slide block. The inner end of the slider inclined top is provided with a mold hole for injection molding of the other side rotating shaft. The rear mold main slide block is provided with a guide block. The slider inclined top is provided with a guide groove along the axial direction of the rotating shaft that cooperates with the guide block. The mold structure design involves core extraction inside the tunnel of the front mold and inclined ejector in the secondary slider of the rear mold, achieving integrated injection molding of the relatively set rotating shaft and the shielding cavity.

2. The injection mold as described in claim 1, characterized in that: The handrail base is provided with a pivot seat, and the pivot is located on the pivot seat. The pivot, the pivot seat and the handrail base are an integral injection molded part.

3. The injection mold as described in claim 2, characterized in that: Each of the aforementioned pivot seats has a protruding pivot on both sides, with the pivot located at the front of the armrest base corresponding to the shielding groove.

4. The injection mold as described in claim 3, characterized in that: The edge of the armrest base is provided with an arc-shaped groove that matches the edge of the armrest cover. The curved surface of the arc-shaped groove is set upward, and the shielding groove is located at the front end of the arc-shaped groove.

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