Art knife

Abstract

The utility model provides an art knife. The art knife comprises a shell, a push button assembly, a button assembly and a blade. A cavity is formed in the shell, an opening is formed in the surface of the shell, and the cavity is communicated with the outside through the opening. The push button assembly comprises a push button, the push button is arranged in the opening in a sliding mode and extends into the cavity, and the push button comprises a wedge-shaped sliding block. The button assembly comprises a button, and the button is arranged on the shell and can move in the direction perpendicular to the sliding direction of the push button. The blade is connected to the push button and can stretch out of or retract into the shell through the push button. The wedge-shaped sliding block of the push button extrudes the button to push the blade out of the shell, the button stops the blade, and the button moves in the direction close to the cavity to retract the blade into the shell.

Description

Technical Field

[0001] The present application relates to the field of stationery, and in particular to a utility knife. Background Art

[0002] A utility knife, also known as a carving knife or wallpaper knife, is a knife used for art and handicrafts. It is mainly used to cut soft objects. It is usually composed of a shell and a blade, and is a pull-out structure. The utility knife mainly extends and retracts the blade by sliding a push button in the opening on the shell.

[0003] In the prior art, when the utility knife is used, after the push button pushes the blade of the utility knife to extend, in order to prevent the blade from rebounding, a small protrusion is usually set on the edge of the opening of the shell to achieve position limiting. The position limiting effect of this method is not ideal. During the cutting process, the blade is prone to uncontrollable rebound after being stressed. At present, there is a lack of a utility knife with a simple structure and easy to retract and release blade, controllable rebound. Utility Model Content

[0004] The main purpose of the present application is to overcome at least one defect of the above-mentioned prior art and to provide a utility knife with a controllable blade extension and retraction, good limiting effect after the blade is extended, easy to operate and simple in structure.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] According to one aspect of the present application, a utility knife is provided, which includes a shell, a push button assembly, a button assembly and a blade. The shell has a cavity inside, and an opening on the surface of the shell, and the cavity is connected to the outside through the opening. The push button assembly includes a push button, which is slidably arranged in the opening and extends into the cavity, and the push button includes a wedge-shaped slider. The button assembly includes a button, which is arranged in the shell and can move in a direction perpendicular to the sliding direction of the push button. The blade is connected to the push button and can be extended or retracted into the shell through the push button. The wedge-shaped slider of the push button squeezes the button to push the blade out of the shell, and the button stops the blade, and the button moves in a direction close to the cavity to retract the blade into the shell.

[0007] According to one of the embodiments of the present application, the push button assembly further includes a first elastic member, which is disposed in the cavity and connected to the shell and the push button, and the first elastic member provides a pulling force.

[0008] According to one of the embodiments of the present application, the cavity of the shell is provided with a hanging column, the push button is provided with a hanging hole, one end of the first elastic member is hung on the hanging column, and the other end is hung on the hanging hole.

[0009] According to one embodiment of the present application, the push button further includes a hand push portion, a push button body and a positioning column. The hand push portion extends out of the opening. The push button body is connected to the hand push portion and extends into the cavity, and the push button body is provided with the hanging hole. The positioning column is provided at one end of the push button body close to the blade, and the blade is connected to the push button through the positioning column.

[0010] According to one embodiment of the present application, one end of the push button body close to the first elastic member extends into the cavity and protrudes to connect to the wedge-shaped slider, the wedge-shaped slider avoids the first elastic member, the wedge-shaped slider has a first inclined surface, and the cross-sectional area of ​​the wedge-shaped slider in the first inclined surface portion gradually decreases from the first elastic member toward the positioning column, wherein the cross-section refers to the surface of the wedge-shaped slider perpendicular to the movement direction of the push button.

[0011] According to one embodiment of the present application, the first elastic member is a tension spring.

[0012] According to one of the embodiments of the present application, the button assembly further includes a second elastic member, wherein the second elastic member is disposed between the housing and the button, and the second elastic member provides pressure.

[0013] According to one embodiment of the present application, the button includes a hand-pressing portion, a button body, a limiting column and a wedge block. The hand-pressing portion is arranged on the housing. The button body is connected to the hand-pressing portion and extends into the cavity. The limiting column is arranged at one end of the button body away from the hand-pressing portion. The wedge block is protrudingly arranged on the button body and mutually squeezed with the wedge-shaped slider to push the blade out of the housing.

[0014] According to one of the embodiments of the present application, the second elastic member is sleeved on the limiting column and is located between the shell and the button body.

[0015] According to one embodiment of the present application, the shell includes a first shell and a second shell, the first shell and the second shell are relatively arranged to form the cavity, the opening is arranged on the first shell, the second shell is provided with an installation groove, and the button body and the limiting column are arranged in the installation groove.

[0016] According to one of the embodiments of the present application, at least one reinforcing rib is disposed on the surfaces of the first shell and the second shell facing the cavity.

[0017] According to one embodiment of the present application, the wedge block has a second inclined surface, the second inclined surface faces the wedge-shaped slider, and the wedge-shaped slider presses and slides along the second inclined surface of the wedge block to push the blade out of the housing.

[0018] According to one embodiment of the present application, the second elastic member is a compression spring.

[0019] It can be seen from the above technical solution that the advantages and positive effects of the utility knife proposed in this application are:

[0020] The utility knife proposed in the present application has a wedge-shaped slider on the push button of the push button assembly squeezing the button to generate movement to push the blade out of the housing. When the wedge slider is separated from the button, the button will return to its position without being squeezed by the wedge slider, thereby stopping the push button and then stopping the blade, achieving a good limiting effect after the blade is extended and avoiding uncontrollable rebound of the blade.

[0021] When the blade of the utility knife proposed in the present application needs to be retracted, it is only necessary to press the button toward the cavity with external force, so that the position of the button moves again, releasing the push button stopped by the button, and the movement of the push button drives the blade to move, thereby retracting the blade into the housing. The utility knife proposed in the present application has easy control over the extension and retraction of the blade, simple structure, easy operation, and reliable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various objects, features and advantages of the present application will become more apparent by considering the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present application and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0023] Figure 1 It is a structural schematic diagram of the utility knife of this application.

[0024] Figure 2 yes Figure 1 A schematic structural diagram of the first shell and the push button assembly after opening along the junction of the first shell and the second shell.

[0025] Figure 3 yes Figure 1 A schematic structural diagram of the second shell and the button assembly after opening along the junction of the first shell and the second shell.

[0026] Figure 4 yes Figure 3 Schematic diagram of the structure of the second shell.

[0027] Figure 5 yes Figure 1 Schematic diagram of the structure of the push button in .

[0028] Figure 6 yes Figure 1 Schematic diagram of the button structure.

[0029] The following are the descriptions of the reference numerals:

[0030] 1. Utility Knife

[0031] 10. Shell;

[0032] 11. Cavity;

[0033] 12. Open your mouth;

[0034] 20. Push button assembly;

[0035] 21. Push button;

[0036] 22. A first elastic member;

[0037] 30.Button component;

[0038] 31. Button;

[0039] 32. A second elastic member;

[0040] 40. Blade;

[0041] 100. Reinforcement ribs;

[0042] 101. First shell;

[0043] 102. Second shell;

[0044] 1021. Mounting slot;

[0045] 111. Hanging column;

[0046] 210. Wedge-shaped slider;

[0047] 211. Hanging hole;

[0048] 212. Hand push department;

[0049] 213. Push button body;

[0050] 214. Positioning column;

[0051] 311. Hand pressing part;

[0052] 312. Button body;

[0053] 313. Limiting column;

[0054] 314. Wedge;

[0055] 2101. First slope;

[0056] 3141.Second slope. DETAILED DESCRIPTION

[0057] Typical embodiments that embody the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different embodiments without departing from the scope of the present application, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present application.

[0058] In the following description of different exemplary embodiments of the present application, reference is made to the accompanying drawings, which form a part of the present application and in which different exemplary structures, systems and steps that can implement multiple aspects of the present application are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present application. When introducing the elements / components / etc. described and / or illustrated herein, the terms "comprising", "including" and "having" are used to represent the meaning of open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be additional elements / components / etc.

[0059] like Figures 1 to 3 As shown, the utility knife 1 of the present application includes a housing 10, a push button assembly 20, a button assembly 30 and a blade 40. The housing 10 has a cavity 11 inside, and an opening 12 on the surface of the housing 10, and the cavity 11 is connected to the outside through the opening 12. The push button assembly 20 includes a push button 21, which is slidably arranged in the opening 12 and extends into the cavity 11, and the push button 21 includes a wedge-shaped slider 210. The button assembly 30 includes a button 31, which is arranged in the housing 10 and can move in a direction perpendicular to the sliding direction of the push button 21. The blade 40 is connected to the push button 21 and can be extended or retracted into the housing 10 through the push button 21. The wedge-shaped slider 210 of the push button 21 squeezes the button 31 to push the blade 40 out of the housing 10, and the button 31 stops the blade 40, and the button 31 moves in a direction close to the cavity 11 to retract the blade 40 into the housing 10.

[0060] The utility knife 1 of the present application pushes the blade 40 out of the housing 10 by squeezing the button 31 with the wedge-shaped slider 210 on the push button 21 of the push button assembly 20; when the wedge-shaped slider 210 moves in the direction in which the blade 40 extends out of the housing 10 until it is separated from the button 31, the button 31 is not squeezed by the wedge-shaped slider 210 and returns to its position, thereby stopping the push button 21 and further stopping the blade 40, achieving a good limiting effect after the blade 40 is extended and avoiding uncontrollable rebound of the blade 40.

[0061] In this embodiment, the housing 10 includes a first housing 101 and a second housing 102 . The first housing 101 and the second housing 102 are disposed opposite to each other to form a cavity 11 . The opening 12 is disposed in the first housing 101 .

[0062] In this embodiment, the push button assembly 20 further includes a first elastic member 22, which is disposed in the cavity 11 and connected to the first housing 101 and the push button 21. The first elastic member 22 provides tension. The first elastic member 22 is a tension spring. The tension spring is disposed between the first housing 101 and the push button 21, so that after the push button 21 is separated from the stopper of the button 31, it can be pulled back into the housing 10 of the utility knife 1 by the tension of the first elastic member 22, thereby realizing a one-key rebound function.

[0063] In this embodiment, the cavity 11 of the housing 10 is provided with a hanging column 111, the push button 21 is provided with a hanging hole 211, and one end of the first elastic member 22 is hung on the hanging column 111, and the other end is hung on the hanging hole 211. The arrangement of the hanging column 111 and the hanging hole 211 enables the first elastic member 22 to apply a pulling force, so as to facilitate pulling the blade 40 to rebound.

[0064] In this embodiment, if Figure 5 As shown, the push button 21 also includes a hand push portion 212, a push button body 213 and a positioning column 214. The hand push portion 212 extends out of the opening 12. The push button body 213 is connected to the hand push portion 212 and extends into the cavity 11, and a hanging hole 211 is provided on the push button body 213. The positioning column 214 is provided at one end of the push button body 213 close to the blade 40, and the blade 40 is connected to the push button 21 through the positioning column 214. There are two positioning columns 214, and the blade 40 is provided with a positioning hole. The positioning column 214 connects the push button 21 with the blade 40 through the positioning hole. The number of positioning holes can be one or two, and does not need to be equal to the number of positioning columns 214. External force can push the blade 40 out of the housing 10 by pushing the hand push portion 212. The first elastic member 22 pulls the hanging hole 211, thereby pulling the push button body 213 to pull the blade 40 back to the housing 10.

[0065] In this embodiment, see Figure 2 and Figure 5 , one end of the push button body 213 near the first elastic member 22 extends toward the inside of the cavity 11 and protrudes to connect the wedge-shaped slider 210, the wedge-shaped slider 210 avoids the first elastic member 22, and the wedge-shaped slider 210 has a first inclined surface 2101. The cross-sectional area of ​​the wedge-shaped slider 210 at the first inclined surface 2101 gradually decreases from the first elastic member 22 to the positioning column 214, wherein the cross-sectional area refers to the surface of the wedge-shaped slider 210 perpendicular to the movement direction of the push button 21. By using the wedge-shaped slider 210 with the first inclined surface 2101, the blade 40 can be extended by squeezing the mating surface of the button 31 by the first inclined surface 2101 during the extension of the blade 40, and when the first inclined surface 2101 passes over the button 31, the button 31 is no longer squeezed by the first inclined surface 2101 and returns to the position to stop the push button 21, thereby limiting the position of the blade 40 after extension and preventing the blade 40 from rebounding uncontrollably.

[0066] In this embodiment, see Figure 3 The button assembly 30 further includes a second elastic member 32, which is disposed between the housing 10 and the button 31, and provides pressure. The second elastic member 32 is a compression spring. The second elastic member 32 enables the button 31 to return to its position after no longer being squeezed by the first inclined surface 2101, thereby limiting the extension position of the blade 40.

[0067] In this embodiment, if Figure 6 As shown, the button 31 includes a hand-pressing portion 311, a button body 312, a limiting column 313 and a wedge block 314. The hand-pressing portion 311 is arranged on the housing 10. The button body 312 is connected to the hand-pressing portion 311 and extends into the cavity 11. The limiting column 313 is arranged at one end of the button body 312 away from the hand-pressing portion 311. The wedge block 314 is protrudingly arranged on the button body 312, and is mutually pressed with the wedge-shaped slider 210 to push the blade 40 out of the housing 10. The wedge block 314 cooperates with the wedge-shaped slider 210 to realize the extension of the blade 40. After the wedge-shaped slider 210 passes over the wedge block 314, due to the pressure of the second elastic member 32, the button 31 returns to its original position. At this time, the wedge block 314 stops the wedge-shaped slider 210, thereby realizing the extension of the blade 40 and the limitation of the blade 40 after the extension.

[0068] In this embodiment, see Figure 3 and Figure 6 The second elastic member 32 is sleeved on the limiting column 313 and is located between the housing 10 and the button 31. The second elastic member 32 mainly acts as follows: after the wedge-shaped slider 210 passes over the wedge block 314, the second elastic member 32 applies pressure to restore the button 31 to its original position, and the wedge block 314 stops the wedge-shaped slider 210, thereby achieving the extension of the blade 40 and the limitation of the blade 40 after the blade 40 is extended.

[0069] In this embodiment, see Figure 4 The second housing 102 is provided with a mounting groove 1021, and the button body 312 and the limiting column 313 are provided in the mounting groove 1021. The setting of the mounting groove 1021 can fix the position of the button 31, and the mounting groove 1021 can limit the movement of the button 31, so that the button 31 body is always located in the mounting groove 1021 during the movement of the button 31.

[0070] In this embodiment, at least one reinforcing rib 100 is disposed on the surfaces of the first shell 101 and the second shell 102 facing the cavity 11. The provision of the reinforcing rib 100 can enhance the strength of the first shell 101 and the second shell 102.

[0071] In this embodiment, see Figure 6The wedge block 314 has a second inclined surface 3141, and the second inclined surface 3141 faces the wedge slider 210. The wedge slider 210 squeezes and slides along the second inclined surface 3141 of the wedge block 314 to push the blade 40 out of the housing 10. The blade 40 is extended by squeezing and cooperating with two inclined surfaces, which has a simple structure and is easy to operate.

[0072] In this exemplary embodiment, the utility knife proposed in this application is described by taking the stationery field as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of this application to other fields, various modifications, additions, substitutions, deletions or other changes are made to the following specific embodiments, and these changes are still within the scope of the principle of the utility knife proposed in this application.

[0073] It should be noted that the utility knives shown in the drawings and described in this specification are only a few examples of many types of utility knives that can adopt the principles of the present application. It should be clearly understood that the principles of the present application are by no means limited to any component of any detail of the utility knives shown in the drawings or described in this specification.

[0074] The above is a detailed description of several exemplary embodiments of the utility knife 1 proposed in the present application. The following is an exemplary description of the use process of the utility knife 1 proposed in the present application.

[0075] Combined with Figures 1 to 6 The use process of the utility knife 1 proposed in this application is as follows:

[0076] The hand push portion 212 of the push button 21 is pushed, and the push button 21 drives the blade 40 to extend out of the shell 10. When the first inclined surface 2101 of the wedge-shaped slider 210 of the push button 21 contacts the second inclined surface 3141 of the wedge block 314 of the button 31, due to the push of external force, the first inclined surface 2101 will squeeze the second inclined surface 3141, so that the wedge block 314 of the button 31 drives the button body 312 to squeeze the second elastic member 32. During this process, the first inclined surface 2101 contacts and slides with the second inclined surface 3141, and the wedge-shaped slider 210 of the push button 21 and the wedge block 314 of the button 31 squeeze each other. The wedge slider 210 slides along the wedge block 314 until the first inclined surface 2101 and the second inclined surface 3141 are separated.

[0077] When the first inclined surface 2101 and the second inclined surface 3141 are disengaged, the extrusion force exerted on the second elastic member 32 during the previous extrusion process disappears, and the second elastic member 32 is released, so that the positions of the button body 312 and the wedge block 314 are restored. In addition, since the first elastic member 22 applies a pulling force to the push button 21 in the direction of retracting the blade 40, when the wedge-shaped slider 210 passes over the wedge block 314, the wedge-shaped slider 210 of the push button 21 will be stopped by the wedge block 314 due to the pulling force of the first elastic member 22, thereby realizing the stopping limit of the blade 40.

[0078] When it is necessary to retract the blade 40, the button 31 is pressed by an external force, and the button 31 moves toward the cavity 11, driving the wedge block 314 of the button 31 to move in the direction of the external force. In this way, the wedge block 314 of the button 31 will leave the stop position, and the wedge-shaped slider 210 of the push button 21, after not being stopped by the wedge block 314, will move in the direction of retraction into the cavity 11 due to the pulling force of the first elastic member 22, thereby driving the blade 40 to be retracted into the shell 10.

[0079] Through the above-mentioned use process of the utility knife 1 of the present application, it can be concluded that the utility knife 1 of the present application has a simple structure, is easy to use, can achieve controllable limiting after the blade 40 is extended, and when the blade 40 needs to be retracted, the button 31 only needs to be pressed to achieve one-click retraction of the blade 40.

[0080] In summary, the utility knife proposed in the present application includes a housing, a push button assembly, a button assembly and a blade. The housing has a cavity inside, and the housing surface has an opening, and the cavity is connected to the outside through the opening. The push button assembly includes a push button, which is slidably arranged in the opening and extends into the cavity, and the push button includes a wedge-shaped slider. The button assembly includes a button, which is arranged in the housing and can move in a direction perpendicular to the sliding direction of the push button. The blade is connected to the push button and can be extended or retracted into the housing through the push button. After the wedge-shaped slider on the push button of the push button assembly squeezes the button to move and push the blade out of the housing, when the wedge-shaped slider is separated from the button, the button will return to its position without being squeezed by the wedge-shaped slider, thereby stopping the push button, and then stopping the blade, achieving a good limiting effect after the blade is extended, and avoiding uncontrollable rebound of the blade. When the button moves in a direction close to the cavity, the blade can be retracted into the housing. It only takes an external force to press the button toward the cavity to release the push button stopped by the button, and the movement of the push button drives the blade to move, thereby retracting the blade into the housing.

[0081] The exemplary embodiments of the utility knife proposed in the present application are described and / or illustrated in detail above. However, the embodiments of the present application are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and staggered with other components and / or steps described herein. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "one", "an", and "above" are used to indicate the presence of one or more elements / components / etc.

[0082] The embodiments of the present application are not limited to the specific embodiments described herein, on the contrary, the components of each embodiment can be used independently and staggered with other components described herein. Each component of an embodiment can also be used in combination with other components of other embodiments. In the description of this specification, the description of the terms "one embodiment", "some embodiments", "other embodiments" 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 application embodiment. 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.

[0083] In the embodiments, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments can be understood according to the specific circumstances.

[0084] Although the utility knife proposed in the present application has been described in terms of various specific embodiments, those skilled in the art will recognize that the present application can be implemented with modifications within the spirit and scope of the claims.

Claims

1. A utility knife, characterized in that: include: A shell, wherein the shell has a cavity inside and an opening on the surface of the shell, and the cavity is connected to the outside through the opening; A push button assembly, the push button assembly comprising a push button, the push button being slidably disposed in the opening and extending into the cavity, the push button comprising a wedge-shaped slider; A button assembly, the button assembly comprising a button, the button being arranged on the housing and being movable in a direction perpendicular to the sliding direction of the push button; a blade connected to the push button and capable of being extended or retracted into the housing through the push button; The wedge-shaped slider of the push button presses the button to push the blade out of the housing, and the button stops the blade. The button moves toward the cavity to retract the blade into the housing.

2. The utility knife according to claim 1, characterized in that: The push button assembly further includes a first elastic member, which is disposed in the cavity and connected to the housing and the push button, and provides a pulling force.

3. The utility knife according to claim 2, characterized in that: The cavity of the shell is provided with a hanging column, the push button is provided with a hanging hole, one end of the first elastic member is hung on the hanging column, and the other end is hung on the hanging hole.

4. The utility knife according to claim 3, characterized in that: The push button also includes: a hand-pushing portion extending out of the opening; A push button body, the push button body is connected to the hand-pushing part and extends into the cavity, and the push button body is provided with the hanging hole; A positioning column is arranged at one end of the push button body close to the blade, and the blade is connected to the push button through the positioning column.

5. The utility knife according to claim 4, characterized in that: One end of the push button body close to the first elastic member extends into the cavity and protrudes to connect to the wedge-shaped slider. The wedge-shaped slider avoids the first elastic member. The wedge-shaped slider has a first inclined surface. The cross-sectional area of ​​the wedge-shaped slider in the first inclined surface portion gradually decreases from the first elastic member toward the positioning column, wherein the cross-sectional area refers to the surface of the wedge-shaped slider perpendicular to the movement direction of the push button.

6. The utility knife according to any one of claims 2 to 5, characterized in that: The first elastic member is a tension spring.

7. The utility knife according to claim 1, characterized in that: The button assembly further includes a second elastic member, which is disposed between the housing and the button and provides pressure.

8. The utility knife according to claim 7, characterized in that: The buttons include: A hand-pressing portion, the hand-pressing portion being arranged on the housing; A button body, the button body is connected to the hand-pressing portion and extends into the cavity; A limiting column, arranged at one end of the button body away from the hand-pressing portion; The wedge block is protrudingly arranged on the button body and is pressed against the wedge-shaped sliding block to push the blade out of the housing.

9. The utility knife according to claim 8, characterized in that: The second elastic member is sleeved on the limiting column and is located between the shell and the button body.

10. The utility knife according to claim 8, characterized in that: The shell includes a first shell and a second shell, the first shell and the second shell are arranged relative to each other to form the cavity, the opening is arranged on the first shell, the second shell is provided with a mounting groove, and the button body and the limiting column are arranged in the mounting groove.

11. The utility knife according to claim 10, characterized in that: At least one reinforcing rib is disposed on the surfaces of the first shell and the second shell facing the cavity.

12. The utility knife according to claim 8, characterized in that: The wedge block has a second inclined surface, and the second inclined surface faces the wedge slider. The wedge slider presses and slides along the second inclined surface of the wedge block to push the blade out of the housing.

13. The utility knife according to any one of claims 7 to 12, characterized in that: The second elastic member is a compression spring.

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