Injection molding housing and electrical appliance

Abstract

The present invention provides an injection-molded housing and an electrical appliance, wherein the injection-molded housing comprises an arc surface and a recessed portion arranged in the arc surface, wherein the junction of the recessed portion and the arc surface comprises a transition portion, wherein the transition portion closes and surrounds the recessed portion, wherein the transition portion is a curved surface, wherein the shortest normal section at any position of the transition portion is the main normal section, wherein the main normal section is an arc with a constant radius of curvature, and wherein the radius of curvature of the main normal sections at different positions of the transition portion are not completely the same. The injection-molded housing of the present invention is provided with a transition portion at the junction of the arc surface and the recessed portion, wherein the surface of the transition portion is a rounded curved surface, which reduces stress concentration and ensures the structural strength of the recessed portion, and by changing the radius of curvature of the main normal section at each position of the transition portion, the width of the transition portion observed by the user in each direction can be adjusted, thereby improving the aesthetics of the housing and eliminating appearance defects.

Description

Technical Field

[0001] The invention relates to the field of injection molding, and in particular to an injection molding housing and an electrical appliance. Background Art

[0002] With the development of injection molding technology, a large number of electrical housings use injection molding. In order to improve the appearance and structural strength, some parts of the housing will use curved surfaces. There will be some recessed structures such as grooves, screw holes, and latches on the housing. The curvature of the curved surface of the housing in these parts does not change continuously, so they can be called discontinuous parts.

[0003] In the prior art, in order to facilitate processing and forming, the edges of the concave structure are chamfered to form a rounded transition part. In the prior art, the radius of curvature of each position of the rounded transition part is equal. From the user's perspective, the transition part has great differences in various directions. For example, the closer to the observation point, the wider the width of the transition part, and the farther away from the observation point, the narrower the width of the transition part, which affects the aesthetics of the shell and makes the internal structure of the concave structure more exposed, forming an appearance defect. Summary of the invention

[0004] The problem solved by the invention is how to eliminate the appearance defects of the injection-molded shell and improve the aesthetics.

[0005] In order to solve the above problems, the present invention provides an injection molded shell, including a curved surface portion and a recessed portion arranged in the curved surface portion, the junction between the recessed portion and the curved surface portion has a transition portion, the transition portion closes and surrounds the recessed portion, the transition portion is a curved surface, the normal section with the shortest length at any position of the transition portion is the main normal section, the main normal section is an arc with a constant curvature radius, and the curvature radius of the main normal section at different positions of the transition portion is not completely the same.

[0006] Compared with the prior art, the injection-molded shell of the present invention is provided with a transition portion at the junction of the arc portion and the recessed portion. The surface of the transition portion is a rounded curved surface, which reduces stress concentration and ensures the structural strength of the recessed portion. The normal section is the boundary line between the curved surface and the normal section of the curved surface. The curvature radius of the main normal section can reflect the degree of bending of the transition portion. By changing the curvature radius of the main normal section at each position of the transition portion, the width of the transition portion observed by the user in various directions can be adjusted, thereby improving the aesthetics of the shell and eliminating appearance defects.

[0007] Optionally, in the transition portion, the smaller the distance from the main normal section to the upright projection plane, the larger the curvature radius. The upright projection plane is the projection plane directly in front of the injection-molded shell, and the closer the transition portion is to the upright projection plane, the larger the curvature radius, and the farther the transition portion is from the upright projection plane, the smaller the curvature radius, thereby reducing the exposed area of ​​the recessed portion and eliminating appearance defects.

[0008] Optionally, the principal normal section curvature radius at each position of the transition portion changes uniformly from the position with the maximum principal normal section curvature radius to the position with the minimum principal normal section curvature radius. The uniform change of the principal normal section curvature radius can ensure the continuity of the appearance of the transition portion and improve the aesthetics.

[0009] Optionally, in the main viewing angle projection of the injection-molded housing, the width of the transition portion in each direction is equal. The main viewing angle is the main viewing angle of the injection-molded housing. The transition portion is isotropic under the main viewing angle, which can improve the aesthetics of the housing.

[0010] Optionally, in the front view of the injection-molded housing, the width of the transition portion in each direction is equal. When the injection-molded housing is observed from the front view, the transition portion is isotropic and the fillet size is uniform.

[0011] Optionally, the minimum curvature radius of the principal normal section of the transition portion is greater than or equal to 1 cm. The curvature radius of the principal normal section of the transition portion should not be too small, otherwise it is not conducive to the cooperation between the injection molded part and the mold, and the edge of the recessed portion is prone to interference with the mold.

[0012] Optionally, the maximum curvature radius of the principal normal section of the transition portion is less than or equal to 5 cm. Reducing the curvature radius of the principal normal section of the transition portion can reduce the internal structure of the exposed recessed portion and avoid the formation of appearance defects.

[0013] Optionally, a latch is provided in the recessed portion. The structure in which the curvature radius of the principal normal section line at each position of the transition portion varies is applicable to the recessed portion provided with a latch, and by adjusting the curvature of the transition portion, the transition portion can cover the latch to avoid appearance defects.

[0014] Optionally, the surface of the plug does not exceed the surface of the curved surface, thereby reducing the exposed structure of the plug and avoiding appearance defects.

[0015] The present invention further provides an electrical appliance, comprising the above-mentioned injection-molded housing. Compared with the prior art, the present invention improves the housing of the electrical appliance, beautifies the edge of the recessed portion, eliminates appearance defects that may occur in the prior art, and improves the aesthetics of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a main viewing angle of the first injection-molded housing in the prior art;

[0017] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0018] Figure 3 This is a view of the first injection-molded housing in the prior art observed from the normal perspective of the first transition portion;

[0019] Figure 4 for Figure 3A partial enlarged view of point B in the middle;

[0020] Figure 5 It is a front view of a first injection-molded housing in the prior art;

[0021] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0022] Figure 7 is an axonometric view of a second injection-molded housing according to an embodiment of the present invention;

[0023] Figure 8 for Figure 7 A partial enlarged view of point D in the middle;

[0024] Fig. 9 This is a main viewing angle of the second injection-molded housing in an embodiment of the present invention;

[0025] Fig.10 for Fig. 9 A partial enlarged view of point E in the middle;

[0026] Fig.11 This is a main viewing angle of the third injection-molded housing in an embodiment of the present invention;

[0027] Fig.12 for Fig.11 A partial enlarged view of point F in the middle;

[0028] Fig.13 is a cross-sectional view of a fourth injection-molded housing and a mold in an embodiment of the present invention;

[0029] Fig.14 for Fig.13 A partial enlarged view of the G in the middle;

[0030] Fig.15 for Fig.14 A partial enlarged view of the H in the middle;

[0031] Fig.16 for Fig.14 A partial enlarged view of point I in the middle;

[0032] Fig.17 This is a main viewing angle of the fifth injection-molded housing in an embodiment of the present invention;

[0033] Fig.18 for Fig.17 A partial enlarged view of the J in the middle;

[0034] Fig.19 This is a front view of a fifth injection-molded housing in an embodiment of the present invention;

[0035] Fig. 20 for Fig.19 A partial enlarged view of point K in the middle.

[0036] Description of reference numerals:

[0037] 1a-first injection-molded housing, 2a-first arc surface, 3a-first recessed portion, 4a-first transition portion, 5a-first latch;

[0038] 1b-second injection-molded housing, 2b-second arc surface, 3b-second recessed portion, 4b-second transition portion, 5b-second latch;

[0039] 1c-third injection-molded shell, 2c-third arc surface portion, 3c-third recessed portion, 4c-third transition portion;

[0040] 1d-fourth injection-molded housing, 2d-fourth arc surface portion, 3d-fourth recessed portion, 4d-fourth transition portion, 5d-fourth latch, 6-mold, 7-boss;

[0041] 1e-fifth injection-molded shell, 2e-fifth arc surface portion, 3e-fifth recessed portion, 4e-fifth transition portion. DETAILED DESCRIPTION

[0042] In the description of the present invention, it should be noted that the terminology nouns in the various embodiments, such as "up", "down", "front", "back", "left", "right", etc., which indicate directions, are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the referred elements and devices must be operated according to the specific directions and defined operations and methods and structures in the specification. Such directional nouns do not constitute a limitation on the present invention.

[0043] A coordinate system XYZ is provided in the drawings of the embodiments of the present invention, wherein the positive direction of X represents the front, the reverse direction of X represents the back, the positive direction of the Y axis represents the top, the reverse direction of the Y axis represents the bottom, the positive direction of the Z axis represents the left, and the reverse direction of the Z axis represents the right.

[0044] In the description of the present invention, it should be noted that the terms "first", "second", and "third" mentioned in the embodiments of the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0045] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0046] Combination Figures 1 to 6 As shown, a conventional injection-molded housing is disclosed, which is defined as a first injection-molded housing 1a and is used as a housing of an electrical appliance.

[0047] The first injection-molded housing 1a has a first arc surface 2a, and the surface of the first arc surface 2a is arc-shaped, which can improve the aesthetics of the housing and reduce the edges of the housing. A first concave recessed portion 3a is provided in the first arc surface 2a, and a first latch 5a is provided in the first recessed portion 3a. The intersection of the first recessed portion 3a and the first arc surface 2a is chamfered to form a first transition portion 4a, and the first transition portion 4a closes and surrounds the first recessed portion 3a.

[0048] The surface of the first transition portion 4a is a rounded curved surface to ensure the structural strength of the concave part. The first transition portion 4a has countless normal sections at any position, and the intersection line between the normal section and the first transition portion 4a is the normal section. The normal section with the shortest length is defined as the main normal section. The curvature radius of the main normal section can reflect the curvature degree of the transition portion. In the prior art, the curvature radius of a main normal section may change or remain unchanged, while the curvature radii of different main normal sections on the first transition portion 4a are exactly the same. Therefore, combined with Figure 3 and Figure 4 As shown, when observing the first injection-molded housing 1a from the normal perspective of the first transition portion 4a, it is observed that the width of the first transition portion 4a in all directions is the same, that is, the normal gap is unified and isotropic.

[0049] However, in reality, when users observe the electrical appliance housing, they do not observe it from the normal direction of the first transition portion 4a, but generally observe it from the front or main perspective. The view observed from the front is the main view, and the main perspective is the main observation perspective of the electrical appliance housing for ordinary users. For example, the main perspective of a wall-mounted air conditioner is the front and lower part of the air outlet, and the main perspective of a TV is the front of the screen. The view observed from the main perspective is the main perspective observation view.

[0050] Observe the first injection molded housing 1a from the front, the main view is as follows Figure 5 and Figure 6As shown, the widths of the first transition portion 4a in various directions on the main view vary greatly. The upright projection plane is the projection plane directly in front of the injection-molded shell (positive direction of the X-axis in the figure). The closer the first transition portion 4a is to the upright projection plane, the smaller the width is, and it is blocked by the first pin 5a. The farther away from the upright projection, the larger the width is, that is, anisotropy is formed, which affects the aesthetics of the shell.

[0051] Observe the first injection-molded housing 1a from the main perspective. Figure 1 and Figure 2 As shown, in the main viewing angle, a large portion of the first latch 5a structure is exposed from the first recessed portion 3a, that is, an appearance defect occurs.

[0052] The present invention solves the problem of how to beautify the appearance of the injection molded housing and eliminate appearance defects. In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0053] Combination Figures 7 to 10 As shown, this embodiment provides an injection molded shell, defined as a second injection molded shell 1b, which is used as a shell of an electrical appliance. The second injection molded shell 1b has a second arc surface 2b, and the surface of the second arc surface 2b is arc-shaped, which can improve the aesthetics of the shell and reduce the edges of the shell. A concave second recessed portion 3b is provided in the second arc surface 2b, and a second latch 5b is provided in the second recessed portion 3b. The intersection of the second recessed portion 3b and the second arc surface 2b is chamfered to form a second transition portion 4b, and the second transition portion 4b closes and surrounds the second recessed portion 3b. The surface of the second transition portion 4b is a rounded curved surface to ensure the structural strength of the recessed portion.

[0054] The principal normal section at any position of the second transition portion 4b is an arc with a constant radius of curvature, but the curvature radii of different principal normal sections of the second transition portion 4b are not exactly the same, that is, the degree of bending at each position of the second transition portion 4b is variable. By adjusting the curvature radius of the principal normal section at each position, the width of the transition portion in various directions observed from the front perspective and the main perspective can be changed, thereby improving the aesthetics of the shell and eliminating appearance defects.

[0055] Specifically, the smaller the distance between the principal normal section and the upright projection plane in the second transition portion 4b, the larger the curvature radius of the principal normal section, and the larger the distance between the principal normal section and the upright projection plane, the smaller the curvature radius, then the width of the second transition portion 4b observed from the main viewing angle in all directions is close.

[0056] Preferably, the principal normal section curvature radius of each position of the second transition portion 4b changes uniformly from the position of maximum principal normal section curvature radius to the position of minimum principal normal section curvature radius, thereby ensuring the appearance continuity of the second transition portion 4b and improving the aesthetics.

[0057] like Fig. 9 and Fig.10 As shown in FIG. 1 , the second injection molded housing 1b is observed from the main perspective, and the width of the second transition portion 4b in each direction is equal, that is, the second transition portion 4b is isotropic and uniform in the main perspective. In addition, the second injection molded housing 1b is observed from the isometric perspective, as shown in FIG. 7 and FIG. Figure 8 As shown, only a small portion of the second latch 5b is exposed from the second recess 3b, thus eliminating appearance defects.

[0058] In this embodiment, the edge shape of the second transition portion 4b is circular. In other embodiments, the edge shape of the transition portion corresponds to the edge shape of the recessed portion, and may be elliptical, sector-shaped, triangular, rectangular, polygonal, irregular, etc. The transition structure with a changing radius of curvature of the main normal section line is suitable for recessed portions of various shapes, which can improve the aesthetics of the injection-molded housing and eliminate appearance defects.

[0059] Combination Fig.11 and Fig.12 As shown, this embodiment provides another injection molded shell, defined as a third injection molded shell 1c, which is used as a shell of a parking air conditioner. The third injection molded shell 1c has a third arc surface 2c, and the surface of the third arc surface 2c is arc-shaped, which can improve the aesthetics of the shell. A concave third recessed portion 3c is provided in the third arc surface 2c, and a third latch is provided in the third recessed portion 3c. The intersection of the third recessed portion 3c and the third arc surface 2c is chamfered to form a third transition portion 4c, and the third transition portion 4c closes and surrounds the third recessed portion 3c. The surface of the third transition portion is a rounded curved surface to ensure the structural strength of the recessed portion.

[0060] The principal normal section at any position of the third transition portion 4c is an arc with a constant radius of curvature, but the curvature radii of different principal normal sections of the third transition portion 4c are different, that is, the degree of bending at each position of the third transition portion 4c varies. By adjusting the curvature radius of each position, the width of the third transition portion 4c in various directions observed from the main perspective can be changed, thereby improving the aesthetics of the shell and eliminating appearance defects.

[0061] Specifically, the curvature radius of the principal normal section in the third transition portion 4c that is closer to the upright projection surface is larger, and the curvature radius of the principal normal section that is farther away is smaller. The curvature radius of the principal normal section at each position of the third transition portion 4c changes uniformly from the position with the maximum curvature radius of the principal normal section to the position with the minimum curvature radius of the principal normal section, thereby ensuring the appearance continuity of the third transition portion 4c. Fig.11 and Fig.12 As shown, in the main viewing angle, the width of the third transition portion 4c increases as it approaches the front, and decreases as it approaches the back, creating a sensory effect of larger objects near and smaller objects far away, thereby increasing the three-dimensional sense of the third transition portion 4c and improving its aesthetics.

[0062] In addition, in the prior art, the radius of curvature of the arc of the main normal section at different positions in the transition part is exactly the same, which will also affect the processing and molding of the injection molded shell. Specifically, the pin is set in the recessed part through the insert molding process, and the mold needs to be provided with a boss, and the pin is placed on the boss, and the inlay line is hidden inside the injection molded shell. The part where the boss is connected to the mold is chamfered. In order to ensure the structural strength of the boss, the chamfer needs to have a larger radius of curvature. In order to reduce appearance defects, the radius of curvature of the main normal section of the transition part is smaller. Therefore, the radius of curvature of the chamfer where the boss is connected to the mold is large, while the radius of curvature of the main normal section of the transition part is small, which will cause interference between the mold and the shell, affecting the quality of the molded product.

[0063] Combination Figures 13 to 16 As shown, this embodiment provides another injection molded shell, defined as a fourth injection molded shell 1d, which is used as a shell of an air conditioner. The fourth injection molded shell 1d has a fourth arc surface 2d, and the surface of the fourth arc surface 2d is an arc shape, which can improve the aesthetics of the shell. A fourth concave recessed portion 3d is provided in the fourth arc surface 2d, and a fourth latch 5d is provided in the fourth recessed portion 3d. The intersection of the fourth recessed portion 3d and the fourth arc surface 2d is chamfered to form a fourth transition portion 4d, and the fourth transition portion 4d closes and surrounds the fourth recessed portion 3d. The surface of the fourth transition portion is a rounded curved surface to ensure the structural strength of the recessed portion.

[0064] The principal normal section at any position of the fourth transition portion 4d is an arc with a constant radius of curvature, and the radii of curvature of different principal normal sections of the fourth transition portion 4d are not exactly the same, that is, the degree of curvature at each position of the fourth transition portion 4d is variable, and the closer the principal normal section is to the upright projection plane, the larger the curvature radius, and the farther the principal normal section is from the upright projection plane, the smaller the curvature radius. By adjusting the curvature radius of the principal normal section at each position of the fourth transition portion 4d, the width of the transition portion observed by the user in various directions can be changed, the aesthetics of the shell can be improved, and appearance defects can be eliminated.

[0065] Combination Fig.13 and Fig.14 As shown, the surface of the fourth plug 5d does not exceed the surface of the fourth curved surface 2d, reducing the exposed structure of the plug. The fourth plug 5d is set in the fourth recessed portion 3d through an insert molding process, and the mold 6 needs to be provided with a boss 7, the insert is placed on the boss 7, the inlay line is hidden in the fourth injection molding shell 1d, and the connecting portion of the boss 7 and the mold 6 is chamfered.

[0066] The curvature radius of the principal normal section at each position of the fourth transition portion 4d is different. Fig.15As shown, the minimum curvature radius of the main normal section of the fourth transition portion 4d is greater than or equal to 1 cm, so as to avoid interference between the chamfer of the boss 7 and the fourth transition portion 4d, which is beneficial to the processing and molding of the fourth injection molded shell 1d. Increasing the minimum curvature radius of the main normal section of the fourth transition portion 4d can increase the curvature radius of the chamfer of the portion where the boss 7 connects to the mold 6, thereby improving the structural strength and solving the problem of insufficient mold structural strength in the prior art.

[0067] However, the curvature radius of the principal normal section of the fourth transition portion 4d should not be too large. Fig.16 As shown, the maximum curvature radius of the principal normal section of the fourth transition portion 4d is controlled to be less than or equal to 5 cm, so as to avoid exposing too much of the internal structure of the fourth recessed portion 3d and keep the shell beautiful.

[0068] Combination Figures 17 to 20 As shown, this embodiment provides another injection molded shell, defined as the fifth injection molded shell 1e, which is used as the shell of the air conditioner. The fifth injection molded shell 1e has a fifth arc surface 2e, and the surface of the fifth arc surface 2e is arc-shaped, which can improve the aesthetics of the shell. A concave fifth recessed portion 3e is provided in the fifth arc surface 2e, and the edge of the fifth recessed portion 3e is rectangular. The intersection of the fifth recessed portion 3e and the fifth arc surface 2e is chamfered to form a fifth transition portion 4e, and the fifth transition portion 4e closes and surrounds the fifth recessed portion 3e. The surface of the fifth transition portion 4e is a rounded curved surface to ensure the structural strength of the recessed portion.

[0069] The curvature of the principal normal section at each position of the fifth transition portion 4e is variable. The closer the principal normal section is to the upright projection plane, the larger the curvature radius is, and the farther the principal normal section is from the upright projection plane, the smaller the curvature radius is. By adjusting the curvature radius of the principal normal section at each position, the width of the fifth transition portion 4e in each direction observed from the front can be changed, so that the width of the fifth transition portion 4e in each direction on the main view is close.

[0070] Observe the fifth injection-molded housing 1e from the front. Fig.17 and Fig.18 As shown, the main view shows that the width of the fifth transition portion 4e in each direction is equal, that is, the fifth transition portion 4e is isotropic, uniform and uniform in the main view.

[0071] This embodiment provides an electrical appliance, using the injection molded housing in the above embodiment. The electrical appliance can be any electrical appliance whose housing material is plastic, such as a television, an air conditioner, a computer, a stereo, etc. The injection molded housing in the above embodiment is used as the housing or part of the housing of the electrical appliance. By changing the degree of curvature of each position of the transition portion, the width of the transition portion observed by the user in each direction can be adjusted, thereby eliminating appearance defects and beautifying the appearance of the electrical appliance.

[0072] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An injection molded housing, It is characterized in that It includes an arc surface and a recessed portion arranged in the arc surface, wherein the junction of the recessed portion and the arc surface has a transition portion, the transition portion encloses and surrounds the recessed portion, the transition portion is a rounded curved surface, the shortest normal section at any position of the transition portion is the principal normal section, the principal normal section is an arc with a constant curvature radius, and the curvature radii of the principal normal sections at different positions of the transition portion are not completely the same; in the transition portion, the smaller the distance from the upright projection surface, the larger the curvature radius of the principal normal section is, and the larger the distance from the upright projection surface, the smaller the curvature radius of the principal normal section is; the curvature radius of the principal normal section at each position of the transition portion changes uniformly from the position with the maximum curvature radius of the principal normal section to the position with the minimum curvature radius of the principal normal section.

2. The injection molded housing according to claim 1, It is characterized in that In the main viewing angle projection of the injection-molded housing, the width of the transition portion in each direction is equal.

3. The injection molded housing according to claim 1, It is characterized in that Projected on the front surface of the injection-molded housing, the width of the transition portion in each direction is equal.

4. The injection molded housing according to claim 1, It is characterized in that The minimum curvature radius of the transition portion is greater than or equal to 1 cm.

5. The injection molded housing according to claim 3, It is characterized in that The maximum curvature radius of the transition portion is less than or equal to 5 cm.

6. The injection molded housing according to any one of claims 1 to 5, It is characterized in that A latch is arranged in the recessed portion.

7. The injection molded housing according to claim 6, It is characterized in that The surface of the latch does not exceed the surface of the arc surface portion.

8. An electrical appliance, It is characterized in that It comprises an injection molded housing as described in any one of claims 1-7.

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