Mold assembly, injection molding part and vehicle

Abstract

The invention provides a mold assembly, an injection molding part and a vehicle, and belongs to the technical field of vehicle interiors. The mold assembly comprises a first mold and a second mold, the first mold is provided with a groove, the groove is provided with a first side wall and a second side wall which are opposite, the first side wall of the groove is provided with a first step, the upper end of the first step is provided with a second step, and the two sides of the second step are provided with a first inclined part and a second inclined part respectively. The distance between the first inclined part and the second inclined part is gradually reduced from the first side wall to the second side wall, the second mold is provided with a protruding part, one side of the protruding part is provided with a third step, one side of the third step is provided with a first step face used for abutting against the first side wall, and the two ends of the first step face are both provided with external corners; the third step is provided with a containing groove matched with the second step in structure, first notches used for avoiding the first inclined part and the second inclined part are formed in the positions, located at the external corners, of one ends of the groove walls of the two sides of the containing groove correspondingly, and the two ends of each first notch have the height difference.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle interior decoration, and in particular to a mold assembly, an injection molded part and a vehicle. Background Art

[0002] The switch panel of the automobile door trim has at least one hole for mounting a switch, such as Figure 1-3 As shown, the existing mold assembly for injection molding a switch panel includes a first mold 1' and a second mold 2', the first mold 1' has a groove 11', the first front side wall 111' of the groove 11' has a first step 12', the first step 12' has a first surface 121' facing upward and a second surface 122' facing backward, the second mold 2' has a protrusion 21', the second front side wall 211' of the protrusion 21' has a second step 22', the second step 22' has a third surface 221' facing downward and a fourth surface 222' facing forward.

[0003] like Figure 2 As shown, Figure 2 This is a state diagram when the first mold 1' and the second mold 2' are molded together. When the first mold 1' and the second mold 2' are molded together, a first cavity 13' for jointly forming a main body 31' of a panel 3' is provided between the first mold 1' and the second mold 2', the bottom surface of the protrusion 21' abuts against the bottom wall of the groove 11', the first front side wall 111' of the groove 11' abuts against the second front side wall 211' of the protrusion 21', the first surface 121' abuts against the third surface 221', and a second cavity 14' for jointly forming a front side hole wall 32' of the panel 3' is provided between the second surface 122' and the fourth surface 222'.

[0004] like Figure 3 As shown, Figure 3 The state diagram of the switch button 4' after being installed in the hole of the panel 3' is that the parting line A of the hole wall on one side of the hole is too high, resulting in the hole wall parting line leaking out, affecting the aesthetics. If the parting line A is designed downward, not only the first surface 121' and the third surface 221' of the mold assembly need to be moved downward, but also the vertical length of the second surface 122' and the fourth surface 222' needs to be increased accordingly, which will inevitably lead to the vertical length of the front hole wall 32' of the panel 3' being too long, thereby affecting the normal use of the switch button 4'. Summary of the invention

[0005] The object of the present invention is to provide a mold assembly, which can realize the downward design of the parting line of the second side hole wall of the hole for hiding without correspondingly increasing the vertical length of the first side hole wall, thereby realizing the normal use of the switch button and the aesthetic appearance.

[0006] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0007] According to one aspect of the present invention, a mold assembly is provided for injection molding an injection molded part with a hole. The mold assembly includes a first mold and a second mold. The first mold is provided with a groove, and the groove has a first side wall and a second side wall opposite to each other. The first side wall has a first step, and the upper end of the first step has a second step. Both sides of the second step have a first oblique portion and a second oblique portion, respectively, and the distance between the first oblique portion and the second oblique portion gradually decreases from the first side wall to the second side wall. The second mold has a protruding portion, and one side of the protruding portion has a third step, and one side of the third step has a first step surface, and both ends of the first step surface have a positive angle, and the positive angle is configured to form a negative angle of the hole. The third step is provided with a receiving groove matching the second step structure, and one end of the groove walls on both sides of the receiving groove are located at the positive angle and have a first notch for avoiding the first oblique portion and the second oblique portion, respectively, and the two ends of the first notch have a height difference.

[0008] According to one embodiment of the present invention, a first rounded corner is provided between the first inclined portion and the top surface of the second step and between the second inclined portion and the top surface of the second step, the groove wall of the accommodating groove is provided with a first arc-shaped groove that matches the first rounded corner and can accommodate the first rounded corner, and the first notch is correspondingly an arc-shaped notch that matches the first rounded corner.

[0009] According to one embodiment of the present invention, a second arc-shaped groove is provided at the intersection between the first oblique portion and the second oblique portion and the first step, and the upper end of the second arc-shaped groove is connected to the lower end of the first rounded corner, and the groove wall of the accommodating groove is provided with a second rounded corner matching the second arc-shaped groove.

[0010] According to an embodiment of the present invention, the arc length of the first fillet gradually increases from the second side wall to the first side wall, and the arc length of the second arc-shaped groove gradually decreases from the first side wall to the second side wall.

[0011] According to an embodiment of the present invention, there is a height difference between the middle height and the heights on both sides of the top surface of the second step, and there is a length difference between the vertical length of the middle portion of the first step surface and the vertical lengths on both sides.

[0012] According to an embodiment of the present invention, the top surface of the second step is an arc-shaped surface from the first oblique portion to the second oblique portion, and the top wall of the accommodating groove is a corresponding arc-shaped surface.

[0013] According to an embodiment of the present invention, a third fillet is provided between the top surface and the side surface of the first step, and a third arc-shaped groove matching with and accommodating the third fillet is provided between the third step and the protruding portion.

[0014] The invention also discloses an injection molded part, which is formed by injection molding the mold assembly.

[0015] According to one embodiment of the present invention, the injection molded part is a switch panel, which includes a panel body and a switch button, the panel body has a hole, the hole has a first side hole wall and two opposite second side hole walls, the lower end surface of the first side hole wall matches the surface of the switch button, the vertical length of the first side hole wall is smaller than the vertical length of the second side hole wall, the switch button can be movably installed in the hole, and the switch button blocks the parting line at the lower end of the second side hole wall.

[0016] The invention also discloses a vehicle, comprising the switch panel.

[0017] An embodiment of the present invention has the following advantages or beneficial effects:

[0018] A mold assembly of the present invention includes a first mold and a second mold, the first mold is provided with a groove, the groove has a first side wall and a second side wall opposite to each other, the first side wall has a first step, the upper end of the first step has a second step, both sides of the second step have a first oblique portion and a second oblique portion respectively, and the distance between the first oblique portion and the second oblique portion gradually decreases from the first side wall to the second side wall, the second mold has a protruding portion, one side of the protruding portion has a third step, one side of the third step has a first step surface for abutting against the first side wall, both ends of the first step surface have a positive angle, the positive angle is configured to form a negative angle of the hole, the third step is provided with a receiving groove matching the second step structure, and one end of the groove walls on both sides of the receiving groove are located at the positive angle and have a first notch for avoiding an oblique portion and a second oblique portion respectively, and the two ends of the first notch have a height difference. When the injection molding is completed, the parting line of the injection molded part forms a matching second notch at the first notch. Since the second notch has a height difference, the first side hole wall and the second side hole wall of the hole have a vertical height difference. In this way, when the parting line of the second side hole wall of the hole is designed downward for hiding, there is no need to increase the vertical length of the first side hole wall accordingly, thereby achieving normal use of the switch button and aesthetic appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0020] Figure 1 It is a partial cross-sectional view of the first mold and the second mold of the prior art.

[0021] Figure 2 It is a cross-sectional view of the first mold and the second mold when the mold is closed in the prior art.

[0022] Figure 3 It is a partial stereoscopic view of a switch panel injection-molded by a first mold and a second mold in the prior art.

[0023] Figure 4This is a perspective view of a first mold shown in one embodiment of the present invention.

[0024] Figure 5 yes Figure 4 A partial enlarged view of .

[0025] Figure 6 It is a partial perspective view of a second mold shown in one embodiment of the present invention.

[0026] Figure 7 It is a partial stereoscopic view of a switch panel injection-molded by the first mold and the second mold of the present invention.

[0027] Figure 8 This is a state diagram of an embodiment of the present invention after the first mold and the second mold are separated and before the injection molded part is demolded.

[0028] The reference numerals are described as follows:

[0029] 1. First mold; 11. Groove; 111. First side wall; 112. Second side wall; 12. First step; 121. Third fillet; 13. Second step; 131. First oblique portion; 1311. First fillet; 1312. Second arc-shaped groove; 132. Second oblique portion; 2. Second mold; 21. Raised portion; 22. Third step; 221. Accommodating groove; 2211. First arc-shaped groove; 2212. Second fillet; 222. Yang angle; 2221. First notch; 223. First step surface; 224. Third arc-shaped groove; 225. Second step surface; 3. Switch panel; 31. Hole; 311. Yin angle; 312. Second arc-shaped opening; 313. First side hole wall; 314. Second side hole wall; 4. Switch button. DETAILED DESCRIPTION

[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0031] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0032] like Figure 4-8As shown, a mold assembly of an embodiment of the present invention is used for injection molding an injection molded part with a hole. The mold assembly includes a first mold 1 and a second mold 2. After the first mold 1 and the second mold 2 are molded together, they jointly form an injection cavity that matches the structure of the injection molded part.

[0033] The first mold 1 has a first molding surface matching the back structure of the injection molded part. The first molding surface is provided with a groove 11. The groove 11 has a first side wall 111 and a second side wall 112 opposite to each other. The first side wall 111 has a first step 12. The upper end of the first step 12 has a second step 13.

[0034] The second step 13 has a first oblique portion 131 and a second oblique portion 132 on both sides thereof, and the distance between the first oblique portion 131 and the second oblique portion 132 gradually decreases from the first side wall 111 to the second side wall 112 .

[0035] The second mold 2 has a second molding surface matching the front structure of the injection molded part. The lower end of the second molding surface has a protrusion 21 for cooperating with the groove 11 to seal the hole. A third step 22 is provided between one side of the protrusion 21 and the main body of the second mold 2.

[0036] The third step 22 has a first step surface 223 on one side, the lower end of the first step surface 223 abuts against the first side wall 111, and both ends of the first step surface 223 have positive corners 222. Figure 7-8 As shown, the male corner 222 is configured as a female corner 311 for forming a hole 31 of the injection molded part, the male corner 222 is used to connect the first step surface 223 and the second step surface 225, the first step surface 223 and the first mold 1 cooperate to form a first side hole wall 313 of the hole 31, and the second step surface 225 is configured to cooperate with the first mold 1 to form a second side hole wall 314 of the hole 31.

[0037] The third step 22 is provided with a receiving groove 221 matching the structure of the second step 13, and one end of the groove wall on both sides of the receiving groove 221 is respectively located at the positive corners 222 on both sides and has a first notch 2221 for avoiding the first oblique portion 131 and the second oblique portion 132, and the two ends of the first notch 2221 have a height difference.

[0038] After the first mold 1 and the second mold 2 are molded together, the bottom surface of the protrusion 21 is sealed against the bottom wall surface of the groove 11, the side of the protrusion 21 facing the first side wall 111 is sealed against the side of the first step 12 facing the second side wall 112, the bottom surface of the third step 22 is sealed against the top surface of the first step 12, the second step 13 is located in the accommodating groove 221, and the lower end of the first step surface 223 is sealed against the first side wall 111.

[0039] The second step 13 is used to raise the parting line of the first step surface 223 so that the vertical length of the first side hole wall 313 is reduced. The first inclined portion 131 and the second inclined portion 132 are used to provide a first notch 2221 at the positive corners 222 on both sides. One end of the first notch 2221 is connected to the parting line of the first step surface 223, and the other end of the first notch 2221 is connected to the parting line at the lower end of the second step surface 225.

[0040] When the injection molding is completed, the parting line of the injection molded part forms a matching second notch 312 at the first notch 2221. Since the second notch 312 has a height difference, the first side hole wall 313 and the second side hole wall 314 of the hole 31 have a vertical height difference. In this way, when the parting line of the second side hole wall 314 of the hole 31 is designed downward for hiding, there is no need to increase the vertical length of the first side hole wall 313 accordingly, thereby achieving normal use of the switch button 4 and aesthetic appearance.

[0041] Of course, the first step 12 and the second step 13 are not limited to being located between the first side wall 111 and the bottom wall of the groove 11. For example, they may also be located between the second side wall 112 and the bottom wall of the groove 11, or the first step 12 and the second step 13 may be provided between the first side wall 111 and the bottom wall and between the second side wall 112 and the bottom wall. In this way, the four inner corners 311 of the hole are provided with a second notch 312, so that the parting lines of one group of opposite side hole walls of the hole are designed downward, and the vertical length of the other group of opposite side hole walls does not need to be increased accordingly. Those skilled in the art may select the position of the second notch 312 according to actual needs.

[0042] like Figure 4-5 As shown, in a preferred embodiment of the present invention, a first rounded corner 1311 is provided between the first oblique portion 131 and the top surface of the second step 13 and between the second oblique portion 132 and the top surface of the second step 13. Figure 6 As shown, both side walls of the receiving groove 221 are provided with first arc grooves 2211 that match the first fillet 1311 and can accommodate the first fillet 1311, and the first notch 2221 is correspondingly an arc notch that matches the first fillet 1311. Since the first fillet 1311 and the arc notch have no edges and corners, the smoothness of the first oblique portion 131 and the second oblique portion 132 is improved, and the impact damage when the first mold 1 and the second mold 2 are closed is avoided, and the service life of the first mold 1 and the second mold 2 is improved. In addition, when the top surface and the side surface of the switch button 4 are in transition with a rounded corner, the arc notch just matches the rounded corner between the top surface and the side surface of the switch button 4, thereby improving the aesthetics.

[0043] Of course, the first notch 2221 is not limited to an arc-shaped notch. For example, there may be oblique straight surfaces between the first oblique portion 131 and the top surface of the second step 13 and between the second oblique portion 132 and the top surface of the second step 13. Those skilled in the art may select the line shape of the first notch 2221 according to actual needs.

[0044] like Figure 4-5 As shown, in one embodiment of the present invention, a second arc groove 1312 is provided between the first oblique portion 131 and the first step 12 and between the second oblique portion 132 and the first step 12, and the upper end of the second arc groove 1312 is connected to the lower end of the first fillet 1311, as shown in FIG. Figure 6 As shown, the groove wall of the accommodating groove 221 is provided with a second fillet 2212 matching the second arc-shaped groove 1312. When the first mold 1 and the second mold 2 are closed, the arc surface of the second fillet 2212 is sealed and abutted with the arc surface of the second arc-shaped groove 1312, thereby increasing the abutment area and improving the sealing performance. In addition, the smoothness of the first oblique portion 131 and the second oblique portion 132 is improved to prevent the occurrence of a sharp steel structure, avoid impact damage during closing the mold, and increase the service life of the mold.

[0045] like Figure 4-5 As shown, in one embodiment of the present invention, the arc length of the first rounded corner 1311 gradually increases from the second side wall 112 to the first side wall 111, the arc length of the first rounded corner 1311 is the largest at the first side wall 111, and the arc length of the second arc groove 1312 gradually decreases from the first side wall 111 to the second side wall 112, so as to further improve the smoothness of the first inclined portion 131 and the second inclined portion 132.

[0046] like Figure 4-5 As shown, in one embodiment of the present invention, the height of the middle portion of the top surface of the second step 13 is different from the height of the two sides, such as Figure 6 As shown, the vertical length of the middle portion of the first step surface 223 has a length difference with the vertical lengths of the two sides thereof so as to match the surface of the switch button 4 .

[0047] For example, when the middle vertical height of the top surface of the switch button 4 is higher than the vertical heights of the two sides, the middle height of the top surface of the second step 13 is correspondingly higher than the heights of the two sides, and the vertical length of the middle of the first step surface 223 is also correspondingly greater than the vertical lengths of the two sides, so that when the first step surface 223 cooperates with the first mold 1 to form a hole, the vertical length of the middle of one side wall is lower than the vertical lengths of the two sides, thereby matching the surface trend of the switch button 4 and improving the aesthetics.

[0048] like Figure 5 , 7As shown, in one embodiment of the present invention, when the surface of the switch button 4 is an arc-shaped surface, the top surface of the second step 13 is an arc-shaped surface from the first inclined portion 131 to the second inclined portion 132, and the top wall of the accommodating groove 221 is a corresponding arc-shaped surface, so that the parting line of the lower end of the first side hole wall 313 of the hole 31 is correspondingly arc-shaped, so that the arc-shaped surface of the lower end of the first side hole wall 313 matches the surface of the switch button 4.

[0049] For example, when the initial position of the switch button 4 is at any one of the first extreme position and the second extreme position, the surface of the switch button 4 is in contact with the lower end of the first side hole wall 313 without any gap, and no gap is leaking, thereby improving the aesthetics. Alternatively, the switch button 4 can be pulled up or pressed down, and when the initial position of the switch button 4 is at the middle first position between the second upward position and the third downward position, when the switch button 4 is pulled up and moved to the second position, the top surface of the switch button 4 is in contact with the lower end of the first side hole wall 313 without any gap, and no gap is leaking, thereby improving the aesthetics.

[0050] like Figure 4-5 As shown, in one embodiment of the present invention, the cross section of the second step 13 is in the shape of an isosceles trapezoid, and the angle between the first oblique portion 131 and the first side wall 111 and the angle between the second oblique portion 132 and the first side wall 111 are both 35-55 degrees. When the angle is 45 degrees, the appearance effect is the best.

[0051] like Figure 4-5 As shown, in one embodiment of the present invention, a third rounded corner 121 is provided between the top surface and the side surface of the first step 12. Figure 6 As shown, a third arc groove 224 is provided between the third step 22 and the raised portion 21, which matches the third fillet 121 and can accommodate the third fillet 121. When the first mold 1 and the second mold 2 are molded together, the arc surface of the third fillet 121 is sealed and abutted with the arc surface of the third arc groove 224, thereby improving the smoothness during the abutment, thereby improving the service life of the mold assembly.

[0052] like Figure 4-5 As shown, in one embodiment of the present invention, a fourth arc-shaped groove 122 is provided between the first step 12 and the bottom wall of the groove 11, and a fourth fillet 211 matching the fourth arc-shaped groove 122 is provided between the bottom wall and the side wall of the protrusion 21. When the first mold 1 and the second mold 2 are molded together, the fourth fillet 211 abuts against the arc-shaped wall surface of the fourth arc-shaped groove 122, thereby improving the smoothness of the abutment and thereby improving the service life of the mold assembly.

[0053] like Figure 6-7 As shown, in one embodiment of the present invention, the external corner 222 is a rounded transition, so that the formed internal corner 311 is a rounded transition, thereby improving the aesthetics of the injection molded part.

[0054] The present invention also provides an injection molded part, which is formed by injection molding the above-mentioned mold assembly. Figure 7 As shown, the injection molded part is a switch panel, which includes a panel body 3 and a switch button 4. The panel body 3 has a hole 31, and the hole 31 has a first side hole wall 313 and two opposite second side hole walls 314. The lower end surface of the first side hole wall 313 matches the top surface of the switch button 4. The vertical length of the first side hole wall 313 is smaller than the vertical length of the second side hole wall 314. Since the vertical length of the second side hole wall 314 is longer than the vertical length of the first side hole wall 313, the parting line of the second side hole wall 314 is lower. When the switch button 4 is movably installed in the hole 31, the switch button 4 blocks the parting line at the lower end of the second side hole wall 314, thereby improving the aesthetics.

[0055] like Figure 7 As shown, in one embodiment of the present invention, the parting line of the first side hole wall 313 and the parting line of the second side hole wall 314 are transitioned through an arc-shaped second notch 312 to avoid sharp corners, thereby reducing stress concentration and appearance defects.

[0056] like Figure 7 As shown, in one embodiment of the present invention, a rounded corner design is adopted between the upper end of the first side hole wall 313 and the panel body 3, and between the upper end of the second side hole wall 314 and the panel body 3, and the rounded corner radius is 0.5mm to 1.5mm, so as to reduce wear and potential jamming problems during switch operation.

[0057] like Figure 7 As shown, in one embodiment of the present invention, the finger contact surface 41 of the switch button 4 has an angle of 1-3° with the horizontal plane, so as to provide a smooth sliding feeling during the switch operation.

[0058] like Figure 7 As shown, in one embodiment of the present invention, when the switch button 4 is in the initial position, there is a movable gap of 0.75-1.25 mm between the surface of the switch button 4 and the lower end surface of the first side hole wall 313. When the car window needs to be closed, the switch button 4 is pulled up with a finger so that the surface of the switch button 4 is seamlessly abutted against the lower end surface of the first side hole wall 313 and the second notch 312. At this time, the switch button 4 turns on the motor that drives the glass to rise.

[0059] The present invention further provides a vehicle, comprising the switch panel. The vehicle of the present invention adopts the switch panel, thereby improving the aesthetics of the overall interior.

[0060] In the embodiments of the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0061] In the description of the embodiments of the present invention, it needs to be understood that the directions or positional relationships indicated by the terms "upper" and "lower" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

[0062] In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold assembly, characterized in that: Used for injection molding an injection molded part having a hole (31), the mold assembly comprises: A first mold (1), wherein the first mold (1) is provided with a groove (11), wherein the groove (11) has a first side wall (111) and a second side wall (112) opposite to each other, wherein a first step (12) is provided between the first side wall (111) and / or the second side wall (112) and the bottom wall, wherein the upper end of the first step (12) has a second step (13), wherein both sides of the second step (13) have a first oblique portion (131) and a second oblique portion (132), respectively, and wherein the distance between the first oblique portion (131) and the second oblique portion (132) gradually decreases from the first side wall (111) toward the second side wall (112); A second mold (2), wherein the second mold (2) has a protruding portion (21), one side of the protruding portion (21) has a third step (22), one side of the third step (22) has a first step surface (223) for abutting against the first side wall (111), both ends of the first step surface (223) have positive angles (222), the positive angles (222) are configured to form negative angles of the hole (31), the third step (22) is provided with a receiving groove (221) matching the structure of the second step (13), and one end of the groove wall on both sides of the receiving groove (221) is located at the positive angle (222) and has a first notch (2221) for avoiding the first oblique portion (131) and the second oblique portion (132), and the two ends of the first notch (2221) have a height difference.

2. The mold assembly according to claim 1, characterized in that: A first rounded corner (1311) is provided between the first oblique portion (131) and the top surface of the second step (13), and between the second oblique portion (132) and the top surface of the second step (13), and both side walls of the accommodating groove (221) are provided with a first arc-shaped groove (2211) matching the first rounded corner (1311), and the first notch (2221) is correspondingly an arc-shaped notch matching the first rounded corner (1311).

3. The mold assembly according to claim 2, characterized in that: A second arc-shaped groove (1312) is provided between the first oblique portion (131) and the second oblique portion (132) and the first step (12), and the upper end of the second arc-shaped groove (1312) is connected to the lower end of the first rounded corner (1311), and the groove wall of the accommodating groove (221) is provided with a second rounded corner (2212) matching the second arc-shaped groove (1312).

4. The mold assembly according to claim 3, characterized in that: The arc length of the first rounded corner (1311) gradually increases from the second side wall (112) to the first side wall (111), and the arc length of the second arc-shaped groove (1312) gradually decreases from the first side wall (111) to the second side wall (112).

5. The mold assembly according to claim 1, characterized in that: The middle of the top surface of the second step (13) has a height difference with both sides, and the vertical length of the middle of the first step surface (223) has a length difference with the vertical length of both sides.

6. The mold assembly according to claim 5, characterized in that: The top surface of the second step (13) is an arc-shaped surface in the direction from the first inclined portion (131) to the second inclined portion (132), and the top wall of the accommodating groove (221) is a corresponding arc-shaped surface.

7. The mold assembly according to claim 1, characterized in that: A third fillet (121) is provided between the top surface and the side surface of the first step (12), and a third arc-shaped groove (224) matching the third fillet (121) and capable of accommodating the third fillet (121) is provided between the third step (22) and the protruding portion (21).

8. An injection molded part, characterized in that: The injection molded part is formed by injection molding of the mold assembly described in any one of claims 1-7.

9. The injection molded part according to claim 8, characterized in that: The injection molded part is a switch panel, comprising a panel body (3) and a switch button (4); the panel body (3) has a hole (31); the hole (31) has a first side hole wall (313) and two opposite second side hole walls (314); the lower end surface of the first side hole wall (313) matches the surface of the switch button (4); the vertical length of the first side hole wall (313) is smaller than the vertical length of the second side hole wall (314); the switch button (4) is installed in the hole (31), and the switch button (4) blocks the parting line at the lower end of the second side hole wall (314).

10. A vehicle, characterized in that: Comprising the switch panel as claimed in claim 9.

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