Simple replaceable vacuum bottle

Abstract

The utility model relates to a simple replaceable vacuum bottle which comprises an outer bottle, a pressing assembly and an inner bottle assembly, the pressing assembly is detachably connected to a top opening of the outer bottle, and the inner bottle assembly is detachably connected to the bottom of the pressing assembly, so that the inner bottle assembly can enter the outer bottle from the top opening of the outer bottle. The inner bottle assembly can be moved out from the top opening of the outer bottle and can also be moved out from the top opening of the outer bottle, and when the inner bottle needs to be replaced, the outer bottle can be separated from the pressing assembly firstly, and then the inner bottle assembly is separated from the pressing assembly for overall replacement. Therefore, the liquid or the emulsion in the inner bottle cannot be in direct contact with the outside in the replacement process, and the problem that the liquid or the emulsion in the inner bottle is easily polluted by the outside in the prior art is solved. In addition, the pressing assembly comprising the pressing cap does not need to be replaced along with the inner bottle assembly, so that unnecessary waste is reduced to a certain extent; meanwhile, due to the fact that the outer bottle, the inner bottle assembly and the pressing assembly are each of a connecting structure capable of being rapidly detached, the inner bottle assembly can be replaced more easily and rapidly.

Description

Technical Field

[0001] The utility model relates to the technical field of lotion bottles, in particular to a simple replacement vacuum bottle. Background Art

[0002] As people's living standards improve, their demand for cosmetics is also growing. A wide variety of cosmetics with different packaging have appeared on the market, and bottled cosmetics are even more diverse. Most of the cosmetic bottles in bottled cosmetics on the market are disposable items. When the liquid or lotion inside is exhausted, the entire bottle is directly discarded, which causes great waste and pollution. To solve the above problem, some manufacturers are currently developing replaceable lotion bottles. The inner bottle containing the contents can be replaced, allowing the outer bottle to be reused.

[0003] For example, the Chinese utility model patent "A Vacuum Bottle with Replaceable Inner Bottle" with application number 202223056305.3 (authorization announcement number CN 218949997 U) includes a spray head assembly, an outer bottle assembly and a replaceable inner bottle. The spray head assembly includes a rotating middle sleeve and a screw ring located on the inner side of the rotating middle sleeve. The screw ring can be rotated and raised relative to the rotating middle sleeve. The lower end of the rotating middle sleeve is provided with a first screw interface, and the lower end of the screw ring is provided with a second screw interface. The outer bottle assembly is detachably connected to the spray head assembly, and a first stud that can be threadedly connected to the first screw interface is provided thereon. The replaceable inner bottle is accommodated in the outer bottle assembly, and a second stud that can be threadedly connected to the second screw interface is provided thereon. The provided vacuum bottle with a replaceable inner bottle overcomes the defects that the inner bottle of the vacuum bottle cannot be replaced and is inconvenient to recycle. However, this replacement method has a disadvantage. Since only the inner bottle is replaced and the spray head assembly is not replaced, the inner bottle needs to be unscrewed from the spray head assembly during the replacement process. This will cause the liquid or emulsion in the inner bottle to come into direct contact with the outside world and be contaminated to a certain extent.

[0004] Therefore, some replacement structures have emerged that can directly replace the entire inner bottle assembly equipped with a lotion pump. For example, the Chinese utility model patent application number 202323293417.5 (authorization publication number CN 221469287 U) discloses a lotion bottle structure, which includes an inner bottle assembly and an outer bottle assembly. The inner bottle assembly and the outer bottle assembly are detachably connected together by threaded engagement. By providing a first limiting portion and a second limiting portion on the outer side wall of the inner bottle assembly, and providing a positioning portion at a corresponding position on the inner side wall of the outer bottle assembly, when the inner bottle assembly is rotated in the tightening direction to a set position, the positioning portion is constrained in the space between the first limiting portion and the second limiting portion, so that the inner bottle assembly will not automatically loosen without the action of external force, so that the inner bottle assembly will not be overtightened or automatically loosened during use. Here, the cosmetics in the inner bottle are prevented from being contaminated by the outside world by replacing the inner bottle assembly as a whole. However, since the entire lotion pump needs to be replaced to achieve the purpose, there will be excessive waste to a certain extent.

[0005] Therefore, how to provide a simple replacement vacuum bottle that can not only prevent the liquid or emulsion in the inner bottle from being contaminated, but also reduce waste during the replacement process of the inner bottle, and make the replacement and disassembly process of the inner bottle simpler and faster, is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a simple replacement vacuum bottle with convenient replacement and disassembly, which can prevent the liquid or emulsion in the inner bottle from being contaminated and reduce waste during the replacement process of the inner bottle.

[0007] The technical solution adopted by the utility model to solve the above technical problems is as follows: the simple replacement vacuum bottle comprises an outer bottle, a pressing assembly and an inner bottle assembly, the outer bottle has an opening at the top, the pressing assembly can be detachably connected to the top opening of the outer bottle, and the inner bottle assembly can be detachably connected to the bottom of the pressing assembly through a first detachable structure, so that the inner bottle assembly can enter the interior of the outer bottle from the top opening of the outer bottle and can also be removed from the top opening of the outer bottle, the pressing assembly has a pressing cap that can be lifted up and down under the action of an external force, and the pressing cap is also provided with a liquid outlet, the pump core of the inner bottle assembly is connected to the liquid outlet of the pressing cap and forms a liquid outlet channel together with the pressing cap, and the liquid in the inner bottle assembly can be transported to the liquid outlet of the pressing cap through the liquid outlet channel by driving the pressing cap downward.

[0008] In order to optimize the clamping structure of the first detachable structure so as to better lock the pressing assembly and the inner bottle assembly, preferably, the first detachable structure includes an internal thread provided on the inner circumferential wall of the pressing assembly and an external thread provided on the outer circumferential wall of the inner bottle assembly. The pressing assembly and the inner bottle assembly are detachably connected together via the internal thread and the external thread. A limiting device is also provided between the internal thread and the external thread to prevent the inner bottle assembly from being over-tightened.

[0009] In order to prevent the inner bottle assembly from continuing to rotate after rotating to the set position and affecting subsequent use, preferably, the limiting device includes a first limiting groove and a first limiting rib that adapt to each other, the first limiting groove is vertically opened on the thread of the internal thread adjacent to the bottom, the first limiting rib is vertically arranged on the outer peripheral wall of the inner bottle assembly and its upper end is connected to the bottom of the thread of the external thread, when the inner bottle assembly is tightened to the predetermined position, the first limiting rib can be adapted in the first limiting groove to prevent the inner bottle assembly from being over-tightened.

[0010] In order to optimize the overall structure of the pressing assembly so that it can better connect the outer bottle and the inner bottle assembly, preferably, the pressing assembly also includes an outer shell, a connecting sleeve built into the outer shell and a reset spring. The pressing cap is connected to the top of the outer shell and is located above the connecting sleeve. The reset spring is arranged between the pressing cap and the connecting sleeve to drive the pressing cap to reset upward after being pressed down. The internal thread is arranged on the inner circumferential wall of the connecting sleeve. The outer shell and the outer bottle are detachably connected together by providing a second detachable structure.

[0011] In order to enable the push cap to better conduct the pump core on the inner bottle assembly, preferably, a through hole is formed on the connecting sleeve for the pump core to pass through from bottom to top, and a connecting tube for connecting the pump core extends downward from the push cap, and the return spring is arranged on the outer peripheral side of the connecting tube and connected between the push cap and the connecting sleeve.

[0012] In order to optimize the clamping structure of the second detachable structure so as to better lock the pressing assembly and the outer bottle, preferably, the second detachable structure includes:

[0013] A clamping block is arranged on the outer side wall of the housing;

[0014] A clamping groove is provided on the inner side wall of the outer bottle for locking the clamping block, the clamping groove comprising a first step surface formed on the inner wall edge of the outer bottle opening and forming an annular shape, and a locking groove formed on the inner wall of the outer bottle opening and extending along the circumferential direction, wherein a guide surface is further connected between the first step surface and the locking groove to guide the clamping block to the locking groove;

[0015] When the inner bottle assembly at the bottom of the pressing assembly enters the outer bottle from the opening of the outer bottle, the clamping block can be matched with the first step surface, and can slide from the first step surface to the locking groove under the guidance of the guide surface during the relative rotation of the outer bottle and the outer shell, so that the outer shell is automatically locked on the outer bottle.

[0016] In order to better guide the clamping block into the locking groove, preferably, the locking groove is arranged below the first step surface, and the guide surface is inclined and connected between the first step surface and the locking groove. During the relative rotation of the outer bottle and the outer shell, the bottom of the clamping block can sequentially abut against the first step surface, the guide surface and the locking groove and slide back and forth to complete the mutual locking or disengagement of the outer bottle and the outer shell.

[0017] In order to prevent the pressing assembly from continuing to rotate after rotating to the set position and affecting subsequent use, preferably, a second limiting rib is also protruded in the locking groove, and the clamping block includes a first clamping block and a second clamping block arranged at intervals along the rotation direction of the shell, and the interval between the first clamping block and the second clamping block forms a second limiting groove adapted to the second limiting rib. When the shell is rotated to the locking position along the tightening direction, the second limiting rib is limited in the second limiting groove to limit the shell from rotating freely relative to the outer bottle in the absence of external force.

[0018] In order to enable the entire inner bottle assembly to be completely and quickly replaced, preferably, the inner bottle assembly further includes an inner bottle, and the pump core is fixed to the top of the inner bottle by a snap connection to form a completely replaceable structure.

[0019] In order to prevent the liquid outlet of the push cap from being exposed to the outside and being contaminated by the outside, preferably, a bottle cap is further included to prevent the push cap from being exposed. The bottle cap is sleeved on the outer shell and covers the push cap. A protrusion is formed on the outer circumferential surface of the outer shell along the circumferential direction, and an annular groove that can adapt to the protrusion is formed on the inner circumferential wall of the bottle cap. The bottle cap can be detachably fixed to the outer shell by the mutual limitation of the protrusion and the annular groove.

[0020] Compared with the prior art, the advantages of the present invention are that: by detachably connecting the pressing assembly to the top opening of the outer bottle and detachably connecting the inner bottle assembly to the bottom of the pressing assembly, the inner bottle assembly can enter the outer bottle from the top opening of the outer bottle and can also be removed from the top opening of the outer bottle. When the inner bottle needs to be replaced, the outer bottle and the pressing assembly can be separated from each other first, and then the inner bottle assembly can be separated from the pressing assembly for replacement. Since the inner bottle assembly includes the inner bottle and the pump core that blocks the inner bottle opening, the liquid or lotion in the inner bottle will not directly come into contact with the outside during replacement, thereby solving the problem of the liquid or lotion in the inner bottle being easily contaminated by the outside in the prior art. In addition, since the pressing assembly including the pressing cap does not need to be replaced together with the inner bottle assembly, unnecessary waste is reduced to a certain extent. At the same time, since the outer bottle, the inner bottle assembly and the pressing assembly all adopt a quick-detachable connection structure, the entire replacement process of the inner bottle assembly is easier and faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional structural diagram of this embodiment (after the bottle cap is removed);

[0022] Figure 2 This is a schematic diagram of the exploded structure of the outer bottle, pressing assembly, and inner bottle assembly in this embodiment;

[0023] Figure 3 This is a schematic diagram of the overall exploded state structure of this embodiment;

[0024] Figure 4 This is a schematic diagram of the exploded three-dimensional structure of this embodiment from another angle;

[0025] Figure 5 This is a schematic longitudinal sectional view of the present embodiment;

[0026] Figure 6 This is a three-dimensional structural diagram of the bottle cap in this embodiment after it is closed;

[0027] Figure 7 Schematic cross-sectional view of the inner bottle assembly for replacement in this embodiment. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0029] Figures 1 to 7 What is shown is a schematic diagram of this embodiment. The simple replacement vacuum bottle in this embodiment mainly includes an outer bottle 1, a pressing component 2, an inner bottle component 3, etc.

[0030] refer to Figures 1 to 4As shown, the outer bottle 1 has an opening at the top, and the pressing assembly 2 is detachably connected to the top opening of the outer bottle 1. The inner bottle assembly 3 is detachably connected to the bottom of the pressing assembly 2 through a first detachable structure 4, so that the inner bottle assembly 3 can enter the interior of the outer bottle 1 from the top opening of the outer bottle 1 and can also be removed from the top opening of the outer bottle 1. The pressing assembly 2 has a pressing cap 2a that can be raised and lowered under the action of an external force. The pressing cap 2a is also provided with a liquid outlet 2a1. The pump core 3a of the inner bottle assembly 3 is connected to the liquid outlet 2a1 of the pressing cap 2a and forms a liquid outlet channel together with the pressing cap 2a. By driving the pressing cap 2a downward, the liquid in the inner bottle assembly 3 can be transported to the liquid outlet 2a1 of the pressing cap 2a through the liquid outlet channel.

[0031] In order to optimize the clamping structure of the first detachable structure 4 so that it can better lock the pressing component 2 and the inner bottle component 3, refer to Figure 3 and Figure 4 As shown, in this embodiment, the first detachable structure 4 includes an internal thread 4a provided on the inner peripheral wall of the pressing component 2 and an external thread 4b provided on the outer peripheral wall of the inner bottle component 3. The pressing component 2 and the inner bottle component 3 are detachably connected together through the internal thread 4a and the external thread 4b. A limiting device 4c is also provided between the internal thread 4a and the external thread 4b to prevent the inner bottle component 3 from being over-tightened.

[0032] Secondly, in order to prevent the inner bottle assembly 3 from continuing to rotate after rotating to the set position and affecting subsequent use, continue to refer to Figure 3 and Figure 4 As shown, the limiting device 4c here includes a first limiting groove 4c1 and a first limiting rib 4c2 that adapt to each other. The first limiting groove 4c1 is vertically opened on the thread of the internal thread 4a adjacent to the bottom, and the first limiting rib 4c2 is vertically arranged on the outer peripheral wall of the inner bottle assembly 3 and has its upper end connected to the bottom of the thread of the external thread 4b. When the inner bottle assembly 3 is tightened to a predetermined position, the first limiting rib 4c2 can adapt to the first limiting groove 4c1 to prevent the inner bottle assembly 3 from being over-tightened.

[0033] In addition, in this embodiment, in order to optimize the overall structure of the pressing assembly 2 so that it can better connect the outer bottle 1 and the inner bottle assembly 3, refer to Figure 3 and Figure 5 As shown, the pressing assembly 2 here also includes a shell 2b, a connecting sleeve 2c built into the shell 2b and a return spring 2d. The pressing cap 2a is connected to the top of the shell 2b and is located above the connecting sleeve 2c. The return spring 2d is arranged between the pressing cap 2a and the connecting sleeve 2c to drive the pressing cap 2a to return upward after being pressed. The internal thread 4a is provided on the inner circumferential wall of the connecting sleeve 2c. The shell 2b and the outer bottle 1 are detachably connected together by providing a second detachable structure 5.

[0034] In addition, in order to make the pressing cap 2a here better conduct the pump core 3a on the inner bottle assembly 3, refer to Figures 3 to 5 As shown, in this embodiment, a through hole 2c1 is specially formed on the connecting sleeve 2c for the pump core 3a to pass through from bottom to top, and a connecting pipe 2a2 for connecting to the pump core 3a extends downward from the pressing cap 2a, and a return spring 2d is provided on the outer peripheral side of the connecting pipe 2a2 and connected between the pressing cap 2a and the connecting sleeve 2c.

[0035] refer to Figure 3 As shown, in this embodiment, in order to optimize the snap-fit ​​structure of the second detachable structure 5 so as to better lock the pressing assembly 2 and the outer bottle 1, the second detachable structure 5 here includes a snap-fit ​​block 5a provided on the outer wall of the shell 2b and a snap-fit ​​groove 5b provided on the inner wall of the outer bottle 1 for locking the snap-fit ​​block 5a. The snap-fit ​​groove 5b includes a first step surface 5b1 formed on the inner wall edge of the opening of the outer bottle 1 and forming an annular shape, and a locking groove 5b2 formed on the inner wall of the opening of the outer bottle 1 and extending along the circumferential direction. A guide surface 5b3 is connected between the first step surface 5b1 and the locking groove 5b2, and can guide the clamping block 5a to the locking groove 5b2; when the inner bottle assembly 3 located at the bottom of the pressing assembly 2 enters the outer bottle 1 from the opening of the outer bottle 1, the clamping block 5a can match on the first step surface 5b1, and can slide from the first step surface 5b1 to the locking groove 5b2 under the guidance of the guide surface 5b3 during the relative rotation of the outer bottle 1 and the outer shell 2b, so that the outer shell 2b is automatically locked on the outer bottle 1.

[0036] At the same time, in order to better guide the engaging block 5a into the locking groove 5b2, the locking groove 5b2 is intentionally provided below the first stepped surface 5b1, and the guiding surface 5b3 is inclined and connected between the first stepped surface 5b1 and the locking groove 5b2. During the relative rotation of the outer bottle 1 and the outer shell 2b, the bottom of the engaging block 5a can sequentially abut against the first stepped surface 5b1, the guiding surface 5b3 and the locking groove 5b2 and slide back and forth to complete the mutual locking or detachment of the outer bottle 1 and the outer shell 2b.

[0037] In addition, in order to prevent the pressing component 2 from continuing to rotate after rotating to the set position and affecting subsequent use, refer to Figure 3 As shown, in this embodiment, a second limiting rib 5b4 is further protruded from the locking groove 5b2, and the clamping block 5a includes a first clamping block 5a1 and a second clamping block 5a2 spaced apart along the rotation direction of the outer shell 2b. The interval between the first clamping block 5a1 and the second clamping block 5a2 forms a second limiting groove 5a3 adapted to the second limiting rib 5b4. When the outer shell 2b is rotated to the locking position along the tightening direction, the second limiting rib 5b4 is limited in the second limiting groove 5a3 to limit the outer shell 2b from rotating freely relative to the outer bottle 1 in the absence of external force.

[0038] In this embodiment, in order to enable the entire inner bottle assembly 2 to be quickly replaced, Figures 2 to 5 As shown, here: the inner bottle assembly 3 also includes an inner bottle 3b, and the pump core 3a is fixed to the top of the inner bottle 3b by a snap connection to form a complete replaceable structure.

[0039] In this embodiment, in order to prevent the liquid outlet 2a1 of the pressing cap 2a from being exposed to the outside and contaminated by the outside, Figure 5 and Figure 6 As shown, a bottle cap 6 is specially provided to prevent the push cap 2a from being exposed. The bottle cap 6 is sleeved on the outer shell 2b and covers the push cap 2a. A protrusion 2b1 is formed on the outer peripheral surface of the outer shell 2b along the circumferential direction, and an annular groove 6a that can adapt to the protrusion 2b1 is formed on the inner peripheral wall of the bottle cap 6. The bottle cap 6 can be detachably fixed to the outer shell 2b by the mutual limitation of the protrusion 2b1 and the annular groove 6a.

[0040] Here we need to explain it in detail. Figures 1 to 6 As shown, in this embodiment, the pressing assembly 2 is detachably connected to the top opening of the outer bottle 1, and the inner bottle assembly 3 is detachably connected to the bottom of the pressing assembly 2, so that the inner bottle assembly 3 can enter the outer bottle 1 from the top opening of the outer bottle 1 and can also be removed from the top opening of the outer bottle 1. When the liquid or lotion in the inner bottle needs to be replaced after use, the outer bottle 1 and the pressing assembly 2 can be separated from each other first, and then the inner bottle assembly 3 can be separated from the pressing assembly 2 for replacement. Figure 7 The figure shows a cross-sectional schematic diagram of the inner bottle assembly 3 for overall replacement. Since the inner bottle assembly 3 here includes the inner bottle 3b and the pump core 3a that blocks the opening of the inner bottle 3b, the liquid or emulsion in the inner bottle will not directly come into contact with the outside world during the replacement process, which solves the problem in the prior art that the liquid or emulsion in the inner bottle is easily contaminated by the outside world; in addition, since the pressing assembly 2 including the pressing cap 2a does not need to be replaced together with the inner bottle assembly 3, unnecessary waste is reduced to a certain extent; at the same time, since the outer bottle 1, the inner bottle assembly 3 and the pressing assembly 2 all adopt a quickly detachable connection structure, the entire replacement process of the inner bottle assembly 3 can be made easier and faster.

[0041] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "up, down", etc. indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A simple replacement vacuum bottle, comprising an outer bottle (1), a pressing assembly (2) and an inner bottle assembly (3), characterized in that: The outer bottle (1) has an opening at the top, the pressing assembly (2) is detachably connected to the top opening of the outer bottle (1), and the inner bottle assembly (3) is detachably connected to the bottom of the pressing assembly (2) through a first detachable structure (4), so that the inner bottle assembly (3) can enter the interior of the outer bottle (1) from the top opening of the outer bottle (1) and can also be removed from the top opening of the outer bottle (1). The pressing assembly (2) has a A pressing cap (2a) is used to achieve vertical movement, and a liquid outlet (2a1) is provided on the pressing cap (2a). The pump core (3a) of the inner bottle assembly (3) is connected to the liquid outlet (2a1) of the pressing cap (2a) and forms a liquid outlet channel together with the pressing cap (2a). By driving the pressing cap (2a) downward, the liquid in the inner bottle assembly (3) can be transported to the liquid outlet (2a1) of the pressing cap (2a) through the liquid outlet channel.

2. The easy-to-replace vacuum bottle according to claim 1, characterized in that: The first detachable structure (4) comprises an internal thread (4a) provided on the inner peripheral wall of the pressing assembly (2) and an external thread (4b) provided on the outer peripheral wall of the inner bottle assembly (3); the pressing assembly (2) and the inner bottle assembly (3) are detachably connected together via the internal thread (4a) and the external thread (4b); and a limiting device (4c) is provided between the internal thread (4a) and the external thread (4b) to prevent the inner bottle assembly (3) from being excessively tightened.

3. The easy-to-replace vacuum bottle according to claim 2, characterized in that: The limiting device (4c) comprises a first limiting groove (4c1) and a first limiting rib (4c2) adapted to each other, wherein the first limiting groove (4c1) is vertically provided on a thread of the internal thread (4a) adjacent to the bottom, and the first limiting rib (4c2) is vertically provided on the outer peripheral wall of the inner bottle assembly (3) and has its upper end connected to the bottom of the thread of the external thread (4b). When the inner bottle assembly (3) is tightened to a predetermined position, the first limiting rib (4c2) can be adapted in the first limiting groove (4c1) to prevent the inner bottle assembly (3) from being excessively tightened.

4. The easy-to-replace vacuum bottle according to claim 2, characterized in that: The pressing assembly (2) further comprises a shell (2b), a connecting sleeve (2c) built into the shell (2b), and a reset spring (2d); the pressing cap (2a) is connected to the top of the shell (2b) and is located above the connecting sleeve (2c); the reset spring (2d) is arranged between the pressing cap (2a) and the connecting sleeve (2c) to drive the pressing cap (2a) to reset upward after being pressed downward; the internal thread (4a) is arranged on the inner peripheral wall of the connecting sleeve (2c); the shell (2b) and the outer bottle (1) are detachably connected together by providing a second detachable structure (5).

5. The easy-to-replace vacuum bottle according to claim 4, characterized in that: The connecting sleeve (2c) is formed with a through hole (2c1) for the pump core (3a) to pass through from bottom to top, the pressing cap (2a) is provided with a connecting pipe (2a2) extending downwardly for connecting with the pump core (3a), and the return spring (2d) is provided on the outer peripheral side of the connecting pipe (2a2) and connected between the pressing cap (2a) and the connecting sleeve (2c).

6. The easy-to-replace vacuum bottle according to claim 4, characterized in that: The second detachable structure (5) comprises: A clamping block (5a) provided on the outer side wall of the housing (2b); A clamping groove (5b) is provided on the inner side wall of the outer bottle (1) for locking the clamping block (5a), the clamping groove (5b) comprising a first step surface (5b1) formed on the inner wall edge of the opening of the outer bottle (1) and forming an annular shape, and a locking groove (5b2) formed on the inner wall of the opening of the outer bottle (1) and extending in the circumferential direction, and a guide surface (5b3) is further connected between the first step surface (5b1) and the locking groove (5b2) and can guide the clamping block (5a) to the locking groove (5b2); When the inner bottle assembly (3) located at the bottom of the pressing assembly (2) enters the outer bottle (1) from the opening of the outer bottle (1), the clamping block (5a) can be matched on the first step surface (5b1), and can slide from the first step surface (5b1) to the locking groove (5b2) under the guidance of the guide surface (5b3) during the relative rotation of the outer bottle (1) and the outer shell (2b), so that the outer shell (2b) is automatically locked on the outer bottle (1).

7. The easy-to-replace vacuum bottle according to claim 6, characterized in that: The locking groove (5b2) is provided below the first step surface (5b1), and the guide surface (5b3) is provided at an angle and connected between the first step surface (5b1) and the locking groove (5b2). During the relative rotation of the outer bottle (1) and the outer shell (2b), the bottom of the clamping block (5a) can sequentially abut against the first step surface (5b1), the guide surface (5b3) and the locking groove (5b2) and slide back and forth to complete the mutual locking or detachment of the outer bottle (1) and the outer shell (2b).

8. The easy-to-replace vacuum bottle according to claim 7, characterized in that: A second limiting rib (5b4) is also protruded in the locking groove (5b2); the clamping block (5a) comprises a first clamping block (5a1) and a second clamping block (5a2) spaced apart along the rotation direction of the shell (2b); the interval between the first clamping block (5a1) and the second clamping block (5a2) forms a second limiting groove (5a3) adapted to the second limiting rib (5b4); when the shell (2b) is rotated to a locking position along the tightening direction, the second limiting rib (5b4) is limited in the second limiting groove (5a3) to limit the shell (2b) from rotating freely relative to the outer bottle (1) in the absence of external force.

9. The simple-replacement vacuum bottle according to any one of claims 1 to 8, characterized in that: The inner bottle assembly (3) further comprises an inner bottle (3b), and the pump core (3a) is fixed to the top of the inner bottle (3b) by a snap connection to form a complete replaceable structure.

10. The easy-to-replace vacuum bottle according to claim 4, characterized in that: The invention also includes a bottle cap (6) for preventing the pressing cap (2a) from being exposed. The bottle cap (6) is sleeved on the outer shell (2b) and covers the pressing cap (2a). A convex block (2b1) is formed on the outer peripheral surface of the outer shell (2b) along the circumferential direction. An annular groove (6a) that can be adapted to the convex block (2b1) is formed on the inner peripheral wall of the bottle cap (6). The bottle cap (6) can be detachably fixed to the outer shell (2b) by the mutual limitation of the convex block (2b1) and the annular groove (6a).

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