Door lock device of oven

Abstract

The utility model discloses a door lock device of an oven. An oven door is hinged to an oven frame. The front end of the pull arm is hinged to the bottom of the box door through a first hinge shaft, and the rear end is provided with a long hole extending in the length direction. Reset springs are hooked on the long holes, and the first reset spring is fixed to a mounting ring at the bottom of the oven frame through a hook; the second reset spring is fixed to the rear side of the oven frame. The included angle alpha formed by the first reset spring and the second reset spring in the free state ranges from 20 degrees to 60 degrees. The mechanical balance in the opening and closing process of the box door is realized through the collaborative layout of the double reset springs and the linkage design of the draw arm long hole. The included angle of 20-60 degrees is formed between the first reset spring and the second reset spring, so that elastic moments are dynamically complemented, reliable locking when the box door is closed is guaranteed, and the door opening operation resistance is reduced. The long hole structure provides an adjustable anchor point for the spring hook, self-adaption to thermal expansion and cold contraction of the box body is achieved, the long-term use stability is improved, meanwhile, the assembly process is simplified, and part abrasion is reduced.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a door lock device for an oven. Background Technology

[0002] With the development of modern kitchen appliances, the safety and user experience of ovens have become important technical indicators. Traditional oven door lock devices often use a single spring structure or a complex mechanical linkage mechanism, which has problems such as uneven reset force, easy fatigue failure after long-term use, and bulky structure. For example, the single spring design often requires a large external force to overcome the spring torque when the door is closed due to the unidirectional elastic force, and the hinge is prone to metal fatigue; while multi-link mechanisms can distribute stress, the number of parts is large and the assembly precision requirements are high, which increases manufacturing costs and maintenance difficulty.

[0003] Furthermore, existing door locks still fall short in achieving a balance between stable locking and easy opening of the lock door. Some designs improve the feel by adding damping devices or adjusting the hinge point position, but this often sacrifices structural compactness or reliability. Especially in high-temperature operating environments, the thermal expansion effect of materials can exacerbate the fit errors between components, leading to fluctuations in locking force or even jamming. Clearly, existing technology needs further improvement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an oven door lock device to solve one or more problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a door lock device for an oven, comprising:

[0006] The oven door is hinged to the front opening of the oven frame via the bottom first hinge axis;

[0007] A pull arm is horizontally arranged on the right side of the oven frame. Its front end is hinged to the bottom of the oven door through a first hinge shaft. The rear end of the pull arm has an elongated hole extending along the length direction.

[0008] The first reset spring adopts a helical spring structure, with its rear end fixed to the mounting ring at the bottom of the oven frame by a hook, and its front end fixed to the elongated hole by a hook.

[0009] The second reset spring adopts a helical spring structure, with its front end fixed to the elongated hole by a hook and its rear end fixed to the rear side of the oven frame.

[0010] The angle α formed between the first return spring and the second return spring in the free state is 20-60°.

[0011] In one embodiment of the present invention, it further includes: a base plate, which is hinged to the bottom opening edge of the oven frame via a second hinge shaft, and a locking block is provided on the front edge of the base plate, the locking block being inserted into the guide groove corresponding to the oven frame to form a lock.

[0012] In one embodiment of the present invention, a plurality of hinge ears are arranged in a row on the bottom of the base plate, and the second hinge shaft passes through the shaft hole of each hinge ear in sequence in the opening direction of two adjacent hinge ears. The two ends of the second hinge shaft are assembled to the bottom of the oven frame.

[0013] In one embodiment of the present invention, a magnetic attraction device is provided between the locking block of the base plate and the oven frame. The magnetic attraction device includes an electromagnet fixed to the base plate and an iron baffle correspondingly disposed on the oven frame.

[0014] In one embodiment of the present invention, the oven frame is provided with a hemispherical locking protrusion, and the ball head surface of the locking protrusion is provided with anti-slip texture; the lower edge of the pull arm is provided with an arc-shaped groove that cooperates with the locking protrusion, and the inlet end of the groove is provided with a tapered guide surface.

[0015] In one embodiment of the present invention, the locking protrusion is integrally formed on the main body of the corner bracket by an embedded injection molding process. The corner bracket also includes a side wing plate perpendicular to the main body, and the side wing plate has a shaft hole that cooperates with the door hinge.

[0016] In one embodiment of the present invention, a U-shaped handle is provided on the top of the box door, and the two ends of the handle are fixed to the top of the box door by quick-release pins, and the gripping part of the handle is covered with an anti-slip rubber sleeve.

[0017] In one embodiment of this utility model, the oven frame is fitted with a sheet metal outer shell, and the side wall of the outer shell has evenly distributed ventilation holes with a rectangular cross-section, and the inner end of the ventilation holes is covered with a stainless steel mesh cover.

[0018] As described above, the oven door lock device of this utility model has the following beneficial effects: Through the dynamic adjustment mechanism of the double return spring and the pull arm elongated hole, the stability and return accuracy of the oven door closing are significantly improved: the first return spring applies a downward pulling force, and the second return spring provides a horizontal backward traction force. The two form a composite vector force at a specific angle, so that the oven door always obtains a uniform linear driving force during the closing process, completely eliminating the phenomenon of incomplete closure or rebound; the elongated hole structure allows the position of the spring hook to adaptively shift with the movement of the door, dynamically compensating for torque changes under different opening and closing angles, and avoiding fatigue fracture caused by spring stress concentration; the integrated locking protrusion and the slot generate a mechanical interlock at the end of the door closing, combined with the heat dissipation optimized outer shell design, maintaining stable structural rigidity and operating feel under long-term high temperature environment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the door lock device of the oven provided by this utility model;

[0021] Figure 2 for Figure 1 Enlarged view of detail A in the middle;

[0022] Figure 3 A partial structural schematic diagram of the oven door lock device provided by this utility model;

[0023] Figure 4 A schematic diagram of the corner bracket structure of the oven door lock device provided by this utility model.

[0024] Component designation explanation

[0025] 1. Oven door; 2. First hinge shaft; 3. Oven frame; 4. Pull arm; 5. Elongated hole; 6. First return spring; 7. Second return spring; 8. Base plate; 9. Locking block; 10. Hinge ear; 11. Second hinge shaft; 12. Locking protrusion; 13. Arc-shaped slot; 14. Corner bracket; 15. Side wing plate; 16. Handle; 17. Outer shell; 18. Ventilation hole. Detailed Implementation

[0026] This utility model provides a door lock device for an oven. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. In the description of this utility model, it should be understood that the terms "up," "down," "left," and "right," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; they should not be construed as limitations on this utility model. Furthermore, the terms "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Please see Figures 1 to 4This utility model provides a door lock device for an oven, comprising: an oven door 1, hinged to the front opening of an oven frame 3 via a first hinge shaft 2 at the bottom; a pull arm 4, laterally disposed on the right side of the oven frame 3, its front end hinged to the bottom of the oven door 1 via the first hinge shaft 2, and the rear end of the pull arm 4 having an elongated hole 5 extending along the length direction; a first return spring 6, employing a helical spring structure, its rear end fixed to a mounting ring at the bottom of the oven frame 3 via a hook, and its front end fixed to the elongated hole 5 via a hook; a second return spring 7, employing a helical spring structure, its front end fixed to the elongated hole 5 via a hook, and its rear end fixed to the rear side of the oven frame 3; the included angle α formed by the first return spring 6 and the second return spring 7 in the free state is 20-60°. The downward pulling force dominated by the first return spring 6 is amplified under the influence of the included angle α, ensuring that the door 1 is tightly pressed against the sealing surface when closed, eliminating gaps. The backward pulling force generated by the second return spring 7 is decomposed into a horizontal component through the included angle α, which counteracts the door's inertial forward thrust and avoids rebound when closed. The included angle α ensures that the resultant force of the two springs is always along the tangent direction of the door 1's movement trajectory, providing a smooth and linear driving force.

[0028] A U-shaped handle 16 is provided at the top of the door 1. Both ends of the handle 16 are fixed to the top of the door 1 by quick-release pins, and the gripping part of the handle 16 is covered with a non-slip rubber sleeve. The U-shaped handle 16 is fixed with quick-release pins, facilitating manual disassembly and replacement, reducing maintenance costs; the non-slip rubber sleeve improves grip comfort and safety, preventing slippage. The top arrangement conforms to ergonomics, ensuring even force distribution during operation and reducing the risk of deformation of the door 1 due to single-point force application.

[0029] Please see Figure 1 The oven frame 3 is fitted with a sheet metal outer shell 17. The side wall of the outer shell 17 has evenly distributed rectangular ventilation holes 18, and the inner end of the ventilation holes 18 is covered with a stainless steel mesh cover.

[0030] The combination of the sheet metal outer shell 17 and the rectangular ventilation holes 18 ensures efficient heat dissipation of the oven while preventing the entry of external foreign objects. The stainless steel mesh cover is corrosion-resistant and easy to clean, and the rectangular ventilation holes 18 balance ventilation volume and structural strength. The modular structure of the outer shell 17 simplifies the installation process, resulting in a neat appearance and facilitating customized production.

[0031] The oven also includes a base plate 8 hinged to the edge of the bottom opening of the oven frame via a second hinge axis 11. A locking block 9 is provided on the front edge of the base plate 8, which is inserted into a corresponding guide groove in the oven frame 3 to form a lock. After the locking block 9 is unlocked, the base plate 8 rotates around the second hinge axis 11, creating an opening at the bottom of the oven. This opening facilitates cleaning the oven interior or placing large baking trays. The hinged structure of the base plate 8 allows for multi-angle suspension to adapt to different operational needs. The cooperation between the locking block 9 and the guide groove ensures that the base plate 8 is securely locked, preventing accidental opening due to vibration or accidental contact. Operation can be completed without additional tools, balancing functionality and ease of use.

[0032] Please see Figure 2 The hinge structure of the base plate 8 is optimized, with multiple hinge ears 10 arranged in a row at the bottom of the base plate 8. The opening direction of adjacent hinge ears 10 is such that a second hinge shaft 11 passes through the shaft hole of each hinge ear 10 sequentially. Both ends of the second hinge shaft 11 are fitted to the bottom of the oven frame 3. The row of reverse-opening hinge ears 10 at the bottom of the base plate 8 achieves even load-bearing at multiple support points through the passage of the second hinge shaft 11. This design disperses the stress during the movement of the base plate 8, reduces single-point wear, and extends the service life of the hinge shaft; it also constrains the movement trajectory of the base plate 8, preventing tilting or jamming, and improving the smoothness and reliability of the opening and closing process. Specifically, a magnetic attraction device is provided between the locking block 9 of the base plate 8 and the oven frame 3. The magnetic attraction device includes an electromagnet fixed to the base plate 8 and a corresponding iron baffle on the oven frame 3. The magnetic attraction device assists the base plate 8 in quickly aligning and locking through the attraction force between the electromagnet and the iron baffle, reducing mechanical collision wear.

[0033] Please see Figure 3 To maintain stability when the oven door 1 is closed, the oven frame 3 is provided with a hemispherical locking protrusion 12, and the spherical surface of the locking protrusion 12 is provided with anti-slip texture. The lower edge of the pull arm 4 is provided with an arc-shaped groove 13 that mates with the locking protrusion 12, and the entrance end of the groove is provided with a tapered guide surface. The design of the hemispherical locking protrusion 12 and the tapered guide groove reduces operational difficulty and improves locking accuracy. The anti-slip texture increases contact friction and prevents slippage; the tapered guide surface guides the pull arm 4 to slide naturally into the groove, avoiding misalignment or jamming caused by misoperation, while also simplifying the mold forming process and reducing manufacturing costs.

[0034] Please see Figure 4The locking protrusion 12 is integrally molded onto the main body of the corner bracket 14 using an embedded injection molding process. The corner bracket 14 also includes a side wing plate 15 perpendicular to the main body, and the side wing plate 15 has a shaft hole that mates with the hinge of the door 1. The integral molding process of the embedded injection-molded corner bracket 14 integrates the locking protrusion 12, the main body, and the side wing plate 15, reducing the number of parts and enhancing structural strength. The shaft hole on the side wing plate 15 directly matches the hinge of the door 1, eliminating the need for additional positioning parts and improving assembly efficiency; the overall injection molding process also provides corrosion resistance and heat insulation, optimizing component lifespan.

[0035] In summary, the oven door lock device of this invention, through the coordinated layout of the double return springs and the linkage structure design of the pull arm 4, effectively balances the locking force when the oven door 1 is closed and the return force when it is opened. The angled fit between the first return spring 6 and the second return spring 7 allows the spring force to generate a dynamic compensation effect during the movement of the oven door 1, ensuring stable locking in the closed state and reducing resistance during opening. The elongated hole 5 at the rear end of the pull arm 4 provides an adjustable anchor point for spring installation, enabling the device to adapt to the slight deformation caused by thermal expansion and contraction of the oven body, enhancing reliability under long-term use. The distributed elastic support of the double springs reduces stress concentration in a single component, improves the durability of the overall structure, simplifies the assembly process, and achieves efficient mechanical balance within a compact space. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0036] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A door lock device for an oven, characterized in that, include: The oven door (1) is hinged to the front opening of the oven frame (3) via the bottom first hinge shaft (2); The pull arm (4) is horizontally arranged on the right side of the oven frame (3), and its front end is hinged to the bottom of the oven door (1) through the first hinge shaft (2). The rear end of the pull arm (4) is provided with an elongated hole (5) extending along the length direction. The first reset spring (6) adopts a helical spring structure. Its rear end is fixed to the mounting ring at the bottom of the oven frame (3) by a hook, and its front end is fixed to the long hole (5) by a hook. The second reset spring (7) adopts a helical spring structure. Its front end is fixed to the long hole (5) by a hook, and its rear end is fixed to the rear side of the oven frame (3). The angle α formed between the first return spring (6) and the second return spring (7) in the free state is 20-60°.

2. The oven door lock device according to claim 1, characterized in that, Also includes: The base plate (8) is hinged to the bottom opening edge of the oven frame via the second hinge shaft (11). The front edge of the base plate (8) is provided with a locking block (9), which is inserted into the corresponding guide groove of the oven frame (3) to form a lock.

3. The oven door lock device according to claim 2, characterized in that: The bottom of the base plate (8) is provided with a row of multiple hinge ears (10). The opening direction of two adjacent hinge ears (10) is such that the second hinge shaft (11) passes through the shaft hole of each hinge ear (10) in sequence. The two ends of the second hinge shaft (11) are assembled to the bottom of the oven frame (3).

4. The oven door lock device according to claim 2, characterized in that: A magnetic attraction device is provided between the locking block (9) of the base plate (8) and the oven frame (3). The magnetic attraction device includes an electromagnet fixed to the base plate (8) and an iron baffle correspondingly provided on the oven frame (3).

5. The oven door lock device according to claim 1, characterized in that: The oven frame (3) is provided with a hemispherical locking protrusion (12), and the ball head surface of the locking protrusion (12) is provided with anti-slip texture; the lower edge of the pull arm (4) is provided with an arc-shaped slot (13) that cooperates with the locking protrusion (12), and the inlet end of the slot is provided with a tapered guide surface.

6. The oven door lock device according to claim 5, characterized in that: The locking protrusion (12) is integrally formed on the main body of the corner bracket (14) by an embedded injection molding process. The corner bracket (14) also includes a side wing plate (15) perpendicular to the main body. The side wing plate (15) has a shaft hole that cooperates with the rotating shaft of the door (1).

7. The oven door lock device according to claim 1, characterized in that: The top of the door (1) is provided with a U-shaped handle (16), and the two ends of the handle (16) are fixed to the top of the door (1) by quick-release pins. The gripping part of the handle (16) is covered with an anti-slip rubber sleeve.

8. The oven door lock device according to claim 1, characterized in that: The oven frame (3) is fitted with a sheet metal outer shell (17). The side wall of the outer shell (17) has evenly distributed ventilation holes (18) with a rectangular cross section. The inner end of the ventilation holes (18) is covered with a stainless steel mesh cover.

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