A steam oven door lock

Abstract

The utility model discloses a kind of steaming oven door locks, including handle, handle head, lock tongue and bottom plate, lock tongue is coaxially rotatable by center bolt connection.Lock tongue is provided with steel ball, and with bottom plate limit recess abutment forms rigid engagement, handle inlay reinforcing plate is fixedly installed with handle head, detachable handle cover design is convenient to assemble and disassemble and adjust fastening nut, simplify wear and tear replacement process.Bottom plate limit ring and lock tongue limit block cooperate to limit rotation angle, ensure that locking and opening angle position is accurate, lock tongue profile hole and center bolt profile part directional direct connection installation, provide the directivity and promote transmission efficiency when door lock is used.Handle head and inlay reinforcing plate split structure, split production process, reduce production difficulty, improve production efficiency, reduce production cost.The utility model realizes reliable locking, opening by structural innovation, smooth operation and convenient maintenance, is suitable for steaming oven, the sealed box body with sealing requirement and the sealed box body with lifting pressure in cavity.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, specifically to a door lock device for a steam oven, and more particularly to a steam oven door lock structure that features reliable locking, convenient operation, and structural stability. Background Technology

[0002] In modern kitchen appliances, steam ovens have become common equipment in both home and commercial kitchens due to their versatility and high efficiency. When a steam oven is working, it generates high-temperature, high-pressure steam inside, therefore, the reliability of the door lock directly affects the appliance's sealing performance, safety, and cooking results. Currently, common steam oven door lock structures on the market have the following technical problems that urgently need to be solved in practical applications:

[0003] Some door locks have unreasonable limiting structure designs and inaccurate control of the bolt rotation angle, which cannot ensure that the top ball and the bottom plate groove are fully engaged.

[0004] The connection between the handle and the latch often uses a simple plug-in joint or a single rivet, lacking an effective anti-wobbling design. During operation, gaps or relative displacement can easily occur between the handle head and the latch, leading to jamming, abnormal noises, or even component breakage. If the rotating connection between the latch and the base plate is not optimized for limiting movement, excessive rotation may cause structural damage. These problems not only degrade the user experience but also shorten the lifespan of the door lock.

[0005] Traditional door locks typically have bolts, nuts, and other fastening components hidden inside the handle or lock body. Repairs require disassembling the outer casing or other auxiliary structures, and may even necessitate specialized tools, making the process time-consuming and labor-intensive. This leads to reliability bottlenecks in single locking mechanisms, insufficient rigidity of mechanical connections, and inefficient maintenance structure design. Utility Model Content

[0006] In view of this, the present invention provides a steam oven door lock, which improves the connection structure of the handle, locking tongue and base plate to achieve reliable locking, smooth operation and convenient maintenance, and solves the problems of poor sealing, unstable structure and inconvenient maintenance in the prior art.

[0007] This utility model provides a steam oven door lock, including a handle, a base plate, a latch, a handle head, a handle cover, a bolt, an elastic washer, a back cover, a sealing plug, a spring pressure plate, a spring, a steel ball, a washer, an anti-rotation nut, a reinforcing plate, and a handle. The handle is connected and fixed to the handle head. The latch is installed between the handle head and the base plate. The latch includes a spring pressure plate, a spring, and a steel ball. One end of the spring abuts against the spring pressure plate, and the other end abuts against the steel ball, pushing the steel ball out of the bottom of the latch and abutting against the groove of the base plate. The bolt passes through the elastic washer, the base plate, the latch, the spring pressure plate, the handle head, and the washer from the center, and is locked by the anti-rotation nut. The handle head and the latch are directionally engaged by a locking mechanism, forming a rotational connection between the latch and the base plate.

[0008] Furthermore, the handle includes a handle glove and a reinforcing plate, the reinforcing plate being embedded inside the handle glove and having one end connected to the handle head.

[0009] Furthermore, the bolt passes through the center of the elastic washer through the bolt through hole of the base plate to the handle head. A washer and an anti-rotation nut are installed on the other side of the bolt through hole. By adjusting the position of the anti-rotation nut, appropriate rotational damping can be obtained. The top of the handle head is provided with a detachable handle cover to facilitate the installation, removal and adjustment of the anti-rotation nut.

[0010] Further describing the aforementioned solution, clamping plates are provided on both sides of the bolt through hole of the handle head, and matching ribs are provided on the latch. The clamping plates clamp the ribs to achieve the engagement of the handle head and the latch. The cooperation between the clamping plates and the ribs forms a "clamping" connection, eliminating the radial gap between the handle head and the latch, and preventing relative wobbling or jamming during operation. The clamping plates evenly clamp the ribs, so that the torque of the handle rotation is synchronously transmitted to the latch, ensuring that the latch rotation angle is consistent with the handle operation, and improving the accuracy of locking / unlocking actions.

[0011] Further describing the aforementioned solution, a protrusion is provided on the upper inner side of the clamping plate to achieve a tight connection between the clamping plate and the rib plate. The protrusion fits tightly against the upper surface of the rib plate, further compressing the connection gap and forming an interference fit. Even if the components experience slight wear after long-term use, the connection rigidity can still be maintained.

[0012] Further description of the aforementioned scheme: the upper surface of the base plate is provided with several grooves around the bolt holes; a limiting cylinder is also provided between the grooves and the bolt holes, the top of the limiting cylinder is provided with a notch, and a limiting block matching the notch is provided in the middle of the latch to limit the rotation angle between the latch and the base plate.

[0013] Further describing the aforementioned solution, the bolt hole in the center of the latch is an irregularly shaped hole, and the contact section between the bolt and the latch is an irregularly shaped part. The bolt abuts against the irregularly shaped hole of the latch through the irregularly shaped part, so that the bolt and the latch form a non-circular fit. When the handle is turned, the bolt cannot spin freely in the latch hole, ensuring that the latch rotates synchronously with the handle, thus improving transmission efficiency. There is no need to set up additional gears or linkages. Power transmission is achieved through geometric fit, reducing structural complexity and cost.

[0014] Further describing the aforementioned solution, an elastic washer is provided between the bolt and the base plate, and the bolt and base plate are rotatably connected. During operation of the steam oven, temperature changes cause slight expansion of the components; the elasticity of the washer compensates for this deformation, preventing the bolt from being too tight or too loose, and ensuring long-term stability.

[0015] Further describing the aforementioned solution, two springs are provided, with the middle portion of each spring installed within a spring sleeve of the locking tongue. The spring sleeve restricts the radial displacement of the spring, preventing it from tilting or jamming during compression. It also isolates the spring from high-temperature steam, extending its service life and ensuring stable locking performance.

[0016] Compared with the prior art, the overall beneficial effects of this utility model are as follows:

[0017] The rigid engagement structure between the top ball and the bottom plate groove, driven by dual springs, creates a double pre-tightening force, ensuring that the top ball always fits tightly against the groove, effectively preventing the door lock from loosening due to steam pressure, vibration, or thermal expansion and contraction during the operation of the steam oven.

[0018] The handle features an embedded reinforcing plate, secured to the handle head with mounting pins. Combined with a clamping structure where the handle head clamps the latch rib, radial clearance between components is eliminated, significantly enhancing the connection rigidity between the handle and the latch. During operation, torque transmission is uniform and synchronized, avoiding jamming, abnormal noise, or breakage issues common in traditional simple plug-in structures, thus improving user feel and structural durability. The use of irregularly shaped holes and bolts prevents free-spinning, ensuring the latch rotates synchronously with the handle, resulting in higher transmission efficiency and more precise operation.

[0019] The removable handle cover at the top of the handle allows for direct exposure of bolts and nuts without disassembling the main body of the steam oven, greatly simplifying the replacement process of easily damaged parts such as springs and top balls, and significantly reducing maintenance time and reliance on professional tools.

[0020] The elastic gasket design between the bolts and the base plate compensates for component deformation under high-temperature environments, preventing bolts from loosening or becoming too tight. The interference fit of the clamping plate tabs and the angle limitation of the limiting structure reduce the risk of component wear and fatigue fracture, enabling the door lock to operate stably for a long time in high-temperature and high-humidity kitchen environments, making it especially suitable for the high-load use scenarios of commercial steam ovens.

[0021] This utility model systematically solves the core problems of existing steam oven door locks, such as poor sealing, unstable operation, and difficult maintenance, through multi-dimensional innovation in locking mechanism, connection structure, maintenance design, and durability. It has significant improvements in reliability, convenience, and environmental adaptability, and has broad market application value and technological advancement significance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0023] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0024] Figure 2 An exploded view diagram provided for an embodiment of this utility model;

[0025] Figure 3 An exploded view diagram provided for an embodiment of this utility model;

[0026] Figure 4 , 5 A schematic diagram of the locking tongue structure provided in an embodiment of this utility model;

[0027] Figure 6 A schematic diagram of the handle structure provided for an embodiment of this utility model;

[0028] Figure 7 This is a schematic diagram of the spring pressure plate structure provided in an embodiment of the present utility model;

[0029] Figure 8 An overall sectional view provided for an embodiment of this utility model.

[0030] The following are the labeling elements in the figure:

[0031] 1. Handle; 2. Base plate; 3. Locking tongue; 4. Handle head; 5. Handle cover; 6. Bolt; 7. Elastic washer; 8. Rear cover; 9. Sealing plug; 10. Spring pressure plate; 11. Spring; 12. Steel ball; 13. Washer; 14. Anti-rotation nut; 15. Reinforcing plate; 16. Handle glove; 41. Bolt through hole; 122. Clamping plate; 123. Protrusion; 131. Front buckle; 132. Rear buckle; 151. Through hole; 22. Limiting cylinder; 23. Bolt hole; 42. Groove; 43. Cavity; 31. Irregular hole; 33. Rib plate; 34. Limiting block; 51. Irregular part.

[0032] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0035] Please see Figures 1-8 As shown, the steam oven door lock provided by this utility model includes a handle 1, a base plate 2, a locking tongue 3, a handle head 4, a handle cover 5, a bolt 6, an elastic washer 7, a rear cover 8, a sealing plug 9, a spring pressure plate 10, a spring 11, a steel ball 12, a washer 13, an anti-rotation nut 14, a reinforcing plate 15, and a handle cover 16. All components are coaxially connected by a central bolt 6 to form a rotatable and lockable linkage structure.

[0036] The handle 1 is composed of an outer handle glove 16 and an inner reinforcing plate 15. The handle glove 16 is made of high-temperature resistant engineering plastic with anti-slip texture on the surface. The inner reinforcing plate 15 is made of stainless steel or aluminum alloy sheet, which is stamped into an arc shape and embedded in the handle glove 16. It is fixed to the top of the handle head 4 by mounting nails to improve the handle's resistance to deformation. The handle head 4 is a cylindrical frustum structure with a bolt through hole 41 at the top. A clamping plate 122 extends symmetrically from the inner side. A protrusion 123 is provided at the upper end of the clamping plate 122 for interference fit with the rib 33 of the latch 3, eliminating radial clearance. A through-hole 31 runs through the middle of the latch 3, engaging with the irregular part 51 of the bolt 6 to ensure synchronous rotation. Ribs 33 are provided on both sides of the top, clamping and connecting with the clamping plate 122 of the handle head. A limiting block 34 is provided on the middle side, engaging with the top notch of the limiting cylinder 22 of the base plate 2 to limit the rotation angle. A spring sleeve 32 is provided inside, accommodating two springs 11. One end of each spring 11 abuts against the spring pressure plate 10, while the other end pushes a steel ball 12 out of the bottom surface of the latch 3, engaging with the groove 42 of the base plate 2. The base plate 2 is a metal base with bolt holes 23 around its perimeter and a groove 42 surrounding it. A limiting cylinder 22 is provided between the groove 42 and the bolt holes 23. The angle of the top notch determines the rotation range of the latch 3.

[0037] Bolt 6 passes through elastic washer 7, base plate 2, locking tongue 3, spring pressure plate 10, and handle head 4 from bottom to top. Its top is locked to anti-rotation nut 14 via washer 13. Elastic washer 7 is installed between base plate 2 and the bottom of bolt 6 to compensate for high-temperature deformation and prevent bolt 6 from loosening. Handle cover 5 covers the top of handle head 4. Its front end is secured to handle head 4 via front buckle 131, and its rear end is secured to handle head 4 via rear buckle 132, which passes through through hole 151 in reinforcing plate 15 and handle glove 16. After twisting, it engages with recessed hole in handle glove 16, which is filled with sealing plug 9 for waterproofing. A cavity 43 is located behind handle head 4, and a rear cover 8 is fitted thereon to prevent moisture intrusion.

[0038] During assembly, first, place the elastic washer 7 on the bottom of the bolt 6, pass it through the bolt through hole 41 on the base plate, with the irregular part 51 facing upwards; align the irregular hole 31 of the locking tongue with the irregular part 51 and insert it, and align the limiting block 34 with the notch of the limiting cylinder 22; after the bolt 6 passes through each component in sequence, install the washer 13 on the top and tighten it with the anti-rotation nut 14; finally, fasten the handle cover 5, fix the front buckle 131 and the rear buckle 132, and fill the concave hole with the sealing plug 9.

[0039] During operation, rotating handle 1 drives handle head 4 to rotate via reinforcing plate 15, clamping plate 122 drives locking tongue 3 to rotate synchronously, limiting block 34 slides along the notch of limiting cylinder 22, and steel ball 12 is locked into groove 42 of base plate 2 under the action of spring 11, and tongue is inserted into door frame lock hole sealing housing; rotating handle 1 in the opposite direction causes steel ball 12 to exit groove 42 and tongue to be pulled out to unlock. During maintenance, remove sealing plug 9, twist back buckle 132 to remove handle cover 5, and replace easily worn parts such as spring 11 and steel ball 12 without disassembling the whole machine.

[0040] This embodiment achieves precise torque transmission, reliable locking, and convenient maintenance through the clamping structure of the clamping plate and rib plate, the double spring driven steel ball engaging groove 42, and the design of the detachable handle cover. It is suitable for steam ovens and various cabinet equipment that require sealing. It can work stably for a long time, especially in high temperature and high humidity environments, improving the safety of equipment use and the user experience.

[0041] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the foregoing claims.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0043] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A steam oven door lock, characterized in that: The components include a handle (1), a base plate (2), a locking tongue (3), a handle head (4), a handle cover (5), a bolt (6), an elastic washer (7), a rear cover (8), a sealing plug (9), a spring pressure plate (10), a spring (11), a steel ball (12), a washer (13), an anti-rotation nut (14), a reinforcing plate (15), and a handle glove (16). The handle (1) is connected and fixed to the handle head (4). The locking tongue (3) is installed between the handle head (4) and the base plate (2). The locking tongue includes a spring pressure plate (10), a spring (11), and a steel ball. The ball (12) is connected to the spring pressure plate (10) at one end and the steel ball (12) at the other end. The steel ball (12) is pushed out of the bottom of the locking tongue (3) and abuts against the groove (42) of the base plate (2). The bolt (6) passes through the elastic washer (7), the base plate (2), the locking tongue (3), the spring pressure plate (10), the handle head (4) and the washer (13) from the center and is locked by the anti-rotation nut (14). The handle head (4) and the locking tongue (3) are connected by a locking position to form a rotational connection between the locking tongue (3) and the base plate (2).

2. The steam oven door lock according to claim 1, characterized in that: The handle (1) includes a handle glove (16) and a reinforcing plate (15). The reinforcing plate (15) is embedded in the handle glove (16) and one end is connected to the handle head (4).

3. The steam oven door lock according to claim 1, characterized in that: The bolt (6) passes through the center of the elastic washer (7) through the bolt through hole (41) of the bottom plate (2) to the handle head (4). A washer (13) and an anti-rotation nut (14) are installed on the other side of the bolt through hole (41). A detachable handle cover (5) is provided on the top of the handle head (4) to facilitate the installation, removal and adjustment of the anti-rotation nut (14).

4. A steam oven door lock according to claim 1, characterized in that: Clamping plates (122) are provided on both sides of the bolt through hole (41) of the handle head (4), and a matching rib plate (33) is provided on the locking tongue (3). The clamping plates (122) clamp the rib plate (33) to achieve the engagement of the handle head (4) and the locking tongue (3).

5. A steam oven door lock according to claim 4, characterized in that: The upper inner side of the clamping plate (122) is also provided with a protrusion (123) to achieve a tight connection between the clamping plate (122) and the rib plate (33).

6. A steam oven door lock according to claim 1, characterized in that: The upper surface of the base plate (2) is provided with a plurality of grooves (42) around the bolt holes (23); a limiting cylinder (22) is also provided between the grooves (42) and the bolt holes (23), the top of the limiting cylinder (22) is provided with a positioning notch, and a limiting block (34) matching the notch is provided in the middle of the latch (3) to limit the rotation angle between the latch (3) and the base plate (2).

7. A steam oven door lock according to claim 1, characterized in that: The bolt hole in the center of the latch (3) is a non-circular hole (31), and the contact section between the bolt (6) and the latch (3) is a non-circular part (51). The bolt (6) abuts against the non-circular hole (31) of the latch (3) through the non-circular part (51).

8. A steam oven door lock according to claim 1, characterized in that: An elastic washer (7) is provided between the bolt (6) and the base plate (2), and the bolt (6) and the base plate (2) are rotatably connected; two springs (11) are provided, and the middle part of the spring (11) is installed in the spring sleeve (32) of the locking tongue (3). By adjusting the position of the anti-rotation nut (14), the force of the elastic washer (7) and the spring (11) is adjusted to provide appropriate damping for the handle (1), handle head (4) and locking tongue (3) during rotation.

9. A steam oven door lock according to claim 1, characterized in that: The top of the handle head (4) and the handle glove (16) are provided with a detachable handle cover (5). The front end of the handle cover (5) is fastened to the handle head (4) by a front buckle (131). The rear end of the handle cover (5) is provided with a rear buckle (132). The rear buckle (132) passes through the reinforcing plate (15) and the through hole (151) of the handle glove (16), and is twisted and fastened in the concave hole of the handle glove (16) by the rear buckle (132). The concave hole is filled with a sealing plug (9) for sealing. The handle head (4) has a cavity (43) on the back and is equipped with a rear cover (8).

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