WiFi antenna structure and router

Abstract

The utility model provides a WiFi antenna structure and a router. The WiFi antenna structure comprises a rod sleeve, an antenna inner core and a fixed seat. The rod sleeve extends along a straight line and is provided with a first extending end and a second extending end, a containing cavity extending in the direction from the first extending end to the second extending end and an opening located in the second extending end and communicated to the containing cavity are formed in the rod sleeve, and a limiting structure is arranged on the cavity wall of the containing cavity; the antenna inner core is positioned in the accommodating cavity and is clamped in the limiting structure; the fixing base is rotationally connected to the second extending end. According to the WiFi antenna structure, the antenna inner core is clamped in the accommodating cavity through the limiting structure, so that the arrangement of a bottom plug is omitted, the assembling steps can be reduced, the antenna inner core can be prevented from shaking in the accommodating groove, and the mounting reliability of the antenna inner core is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of WiFi antennas, and in particular relates to a WiFi antenna structure and a router. Background Art

[0002] At present, WiFi antenna structures are widely used in routers. The WiFi antenna structure can radiate the waveguide signal in the transmission cable into the surrounding space, so that the signal is converted from a waveguide signal to a free space radio wave signal, and can convert the free space radio wave signal into a waveguide signal.

[0003] The WiFi antenna structure generally includes a rod sleeve, an antenna core, a connecting feeder, a bottom plug, an upper fixing seat and a lower fixing seat. The rod sleeve has a receiving cavity, the antenna core is located in the receiving cavity, the bottom plug is connected to the bottom opening of the receiving cavity to limit the antenna core, the upper fixing seat is connected to the bottom of the rod sleeve, the lower fixing seat is rotatably connected to the upper fixing seat, and connected to the housing of the router. The connecting feeder is electrically connected to the antenna core, and after passing through the bottom plug, the upper fixing seat and the lower fixing seat in sequence, it is electrically connected to the mainboard inside the router.

[0004] The antenna core of the current WiFi antenna structure is positioned by a bottom plug, which not only increases the assembly steps, but also the installation error of the bottom plug will cause the antenna core to shake in the accommodating cavity, reducing the reliability of the WiFi antenna structure. Utility Model Content

[0005] The utility model aims to provide a WiFi antenna structure and a router, aiming to solve the technical problems that the existing WiFi antenna structure increases assembly steps by positioning the antenna core through a bottom plug and may cause the antenna core to shake in the accommodating cavity.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] In a first aspect, a WiFi antenna structure is provided, including a pole sleeve, an antenna core and a fixing seat.

[0008] The rod sleeve extends in a straight line and has a first extension end and a second extension end. The rod sleeve is formed with a receiving cavity extending from the first extension end to the second extension end and an opening located at the second extension end and connected to the receiving cavity. A limiting structure is provided on the cavity wall of the receiving cavity.

[0009] The inner core of the antenna is located in the accommodating cavity and is clamped in the limiting structure;

[0010] The fixing seat is rotatably connected to the second extending end.

[0011] In one of the embodiments of the first aspect, the limiting structure includes a slide formed on the inner wall of the accommodating cavity, the slide extends from the first extension end to the second extension end, and the antenna core is snapped into the slide by interference fit with the slide.

[0012] In one embodiment of the first aspect, the cavity wall of the accommodating cavity is provided with two first convex strips which are spaced apart from each other, and the two first convex strips and the cavity wall of the accommodating cavity together form the slideway.

[0013] In one of the embodiments of the first aspect, the limiting structure includes two second protrusions arranged at intervals and a stopper connecting the two second protrusions, the two second protrusions and the cavity wall of the accommodating cavity together form a limiting groove adapted to be plugged into the antenna core, the first extension end is closed to abut against one end of the antenna core, and the stopper abuts against the other end of the antenna core.

[0014] In one embodiment of the first aspect, two limiting structures are provided, and the two limiting structures are arranged on opposite sides of the cavity wall of the accommodating cavity, and the antenna core is snap-connected with both limiting structures.

[0015] In one of the embodiments of the first aspect, the side wall of the rod sleeve is further provided with an avoidance hole and a through hole, both of which penetrate into the accommodating cavity and are opened in perpendicular directions, the hole wall of the avoidance hole penetrates to the end surface of the second extension end, the fixing seat includes a connected rotating member and a connecting member, the connecting member is used to connect an external structural member, the rotating member is provided with a rotation hole, the WiFi antenna structure also includes a pin passing through the through hole and the rotation hole, the rotating member is rotatably connected to the second extension end via the pin, and the avoidance hole is located on the rotation path of the fixing seat and is used to avoid the rotation of the fixing seat.

[0016] In one of the embodiments of the first aspect, the rotating member includes two spaced-apart rotating parts, both of the rotating parts are provided with the rotating hole, the side walls of the rotating parts are provided with a plurality of locking grooves, and the cavity wall of the accommodating cavity is provided with a locking protrusion. During the rotation of the rotating member, the locking protrusion can be sequentially engaged with each of the locking grooves to limit the rotation of the fixed seat relative to the rod sleeve.

[0017] In one of the embodiments of the first aspect, there are three locking grooves, each of which extends radially along the rotating hole, and the three locking grooves can be engaged with the locking protrusion so that the rod sleeve and the fixing seat are limited to 90°, 135° and 180° respectively.

[0018] In one of the embodiments of the first aspect, a guide groove is provided on the cavity wall of the accommodating cavity, and the guide groove passes through to the end face of the second extension end, the through hole is located in the extension direction of the guide groove, and the angle between the groove wall surface of the guide groove close to the through hole and the groove bottom surface of the guide groove is an obtuse angle.

[0019] In a second aspect, a router is provided, comprising the WiFi antenna structure as described in the above embodiments.

[0020] The technical effect of the utility model compared with the prior art is that the WiFi antenna structure clamps the antenna core in the accommodating cavity through the limiting structure, thereby eliminating the need for a bottom plug. This not only reduces the number of assembly steps, but also prevents the antenna core from shaking in the accommodating groove, thereby improving the reliability of the antenna core installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a three-dimensional structural diagram of the WiFi antenna structure provided by an embodiment of the utility model;

[0023] Figure 2 yes Figure 1 A partial cross-sectional view of the WiFi antenna structure;

[0024] Figure 3 yes Figure 1 An exploded diagram of the WiFi antenna structure in Figure 1;

[0025] Figure 4 yes Figure 3 A partial enlarged view of the WiFi antenna structure.

[0026] Description of reference numerals:

[0027] 10. Rod sleeve; 11. Limiting structure; 12. Positioning protrusion; 111. First convex strip; 101. Accommodating cavity; 102. Opening; 103. Slideway; 104. Avoidance hole; 105. Through hole; 106. Guide groove; 20. Antenna core; 30. Fixed seat; 31. Rotating member; 32. Connecting member; 301. Rotating hole; 302. Positioning groove; 311. Rotating part; 40. Pin. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] This embodiment provides a WiFi antenna structure, which is used to connect to an external structure to receive signals and transmit them to the external structure. The external structure may be a main body of a router or other device that requires an antenna.

[0034] See also Figure 1 and Figure 3 The WiFi antenna structure includes a rod sleeve 10, an antenna core 20 and a fixing seat 30.

[0035] Please combine Figure 2The rod sleeve 10 extends in a straight line, and has a first extension end and a second extension end. The rod sleeve 10 is formed with a receiving cavity 101 and an opening 102. The receiving cavity 101 extends from the first extension end to the second extension end. The opening 102 is located at the second extension end and communicates with the receiving cavity 101. A limiting structure 11 is provided on the cavity wall of the receiving cavity 101. The first extension end of the rod sleeve 10 can be closed to prevent external dust or impurities from entering the receiving cavity 101. In other embodiments, the first extension end of the rod sleeve 10 can also be set through, which is not limited here and can be set according to needs.

[0036] The antenna core 20 is located in the accommodating cavity 101 and is clamped in the limiting structure 11. The antenna core 20 can be a circuit board extending in a straight line, and the length of the antenna core 20 in the extending direction is less than the length of the rod sleeve 10 in the extending direction, so that the rod sleeve 10 can protect the antenna core 20. During installation, the antenna core 20 can be inserted into the accommodating cavity 101 through the opening 102 on the rod sleeve 10, and then the antenna core 20 is clamped with the limiting structure 11.

[0037] The fixing seat 30 is rotatably connected to the second extension end. The fixing seat 30 is used to connect with the external structural member. When the rod sleeve 10 rotates relative to the fixing seat 30, the antenna core 20 can also be driven to rotate relative to the fixing seat 30. At this time, the antenna core 20 can change the direction of receiving signals. Among them, the antenna core 20 can be electrically connected to the connecting feeder, and the connecting feeder can pass through the fixing seat 30 and be electrically connected to the main board in the external structural member. Accordingly, a threading hole is opened on the fixing seat 30.

[0038] The WiFi antenna structure clamps the antenna core 20 in the accommodating cavity 101 through the limiting structure 11, thereby eliminating the need for a bottom plug. This not only reduces the number of assembly steps, but also prevents the antenna core 20 from shaking in the accommodating groove, thereby improving the reliability of the installation of the antenna core 20.

[0039] In some embodiments, see Figure 2 and Figure 3 The limiting structure 11 includes a slideway 103 formed on the inner wall of the accommodating cavity 101, and the slideway 103 extends from the first extension end to the second extension end. The antenna core 20 is clamped in the slideway 103 by interference fit with the slideway 103. During installation, the antenna core 20 can be directly inserted into the slideway 103 by external force. The antenna core 20 is interference fit with the slideway 103 under the action of external force. The friction between the antenna core 20 and the slideway 103 can limit the antenna core 20 from coming out of the slideway 103, thereby fixing the antenna core 20. This method is easy to install, does not require other structures to assist in fixing the antenna core 20, and saves costs.

[0040] It should be noted that the interference fit between the antenna core 20 and the slideway 103 can be an interference fit between the antenna core 20 and the slideway 103 in the width direction of the slideway 103. In this case, the width of the slideway 103 is slightly smaller than the thickness of the antenna core 20, and the width of the accommodating cavity 101 in the height direction of the slideway 103 is greater than or equal to the width of the antenna core 20. The antenna core 20 and the slideway 103 can also be an interference fit in the height direction of the slideway 103. In this case, the width of the accommodating cavity 101 in the height direction of the slideway 103 is slightly smaller than the width of the antenna core 20, and the width of the slideway 103 is equal to the thickness of the antenna core 20, so as to limit the movement of the antenna core 20 in the thickness direction. In addition, the extension of the slideway 103 from the first extension end to the second extension end means that the extension direction of the slideway 103 is roughly consistent with the extension direction of the rod sleeve 10.

[0041] Optionally, the end of the slideway 103 in the direction of the opening 102 may be provided through, so as to facilitate pushing the antenna core 20 into the slideway 103 from the open through end of the slideway 103 .

[0042] As one implementation, see Figure 2 and Figure 3 The cavity wall of the accommodating cavity 101 is provided with two first convex strips 111 arranged at intervals, and the two first convex strips 111 and the cavity wall of the accommodating cavity 101 together form a slideway 103. In this way, the arrangement of the slideway 103 will not reduce the thickness of the rod sleeve 10, thereby ensuring the structural strength of the rod sleeve 10. The two convex strips are arranged in parallel, and the extension length of the two convex strips can be greater than or equal to the extension length of the antenna core 20, so as to increase the contact area between the antenna core 20 and the slideway 103, thereby increasing the friction between the two.

[0043] In other embodiments, the slideway 103 may be a groove opened on the cavity wall of the accommodating cavity 101 , which is not limited here.

[0044] Optionally, two limiting structures 11 are provided, and the two limiting structures 11 are provided on opposite sides of the cavity wall of the accommodating cavity 101, and the antenna core 20 is snap-fitted with both limiting structures 11. Specifically, two first convex strips 111 are provided on the cavity walls on opposite sides of the accommodating cavity 101, and the slideways 103 formed by the two first convex strips 111 on each side cavity wall are oppositely positioned and have equal widths, so as to be snap-fitted with both ends of the antenna core 20 in the width direction. The provision of the two limiting structures 11 enhances the limiting effect on the antenna core 20, further limits the displacement of the antenna core 20 relative to the rod sleeve 10, and prevents the antenna core 20 from shaking in the accommodating cavity 101.

[0045] As another embodiment, the limiting structure 11 includes two second convex strips arranged at intervals and a stopper connecting the two second convex strips. The two second convex strips and the cavity wall of the accommodating cavity 101 together form a limiting groove adapted to be plugged with the antenna core 20. The two second convex strips are used to limit the movement of the antenna core 20 in the thickness direction. The first extension end is closed to abut against one end of the antenna core 20, and the stopper abuts against the other end of the antenna core 20. In this way, the antenna core 20 is limited in the extension direction of the rod sleeve 10 by the cavity wall of the first extension end and the stopper, preventing the antenna core 20 from escaping from the accommodating cavity 101.

[0046] Optionally, the two second convex strips are arranged in parallel, and the stopper is connected to the ends of the two second convex strips close to the opening 102. The distance between the stopper and the cavity wall of the first extension end can be equal to the extension length of the antenna core 20. At this time, the width of the accommodating cavity 101 in the groove depth direction of the limiting groove must be equal to the width of the antenna core 20 to prevent the antenna core 20 from shaking in the accommodating cavity 101. The distance between the stopper and the cavity wall of the first extension end can also be slightly smaller than the extension length of the antenna core 20. At this time, the antenna core 20 can be clamped between the stopper and the cavity wall of the first extension end by interference fit, thereby realizing the limitation of the antenna core 20 in the accommodating cavity 101.

[0047] In order to realize the installation of the antenna core 20, the rod sleeve 10 can be designed to include a first sleeve part and a second sleeve part that are connected, and the first sleeve part and the second sleeve part together form a receiving cavity 101. A second convex strip and a partial stopper are respectively provided on the first sleeve part and the second sleeve part. After the first sleeve part and the second sleeve part are connected, the first convex strip 111 and the second convex strip will form a limiting groove. When installing the antenna core 20, the first sleeve part and the second sleeve part are separated first, and then the antenna core 20 is clamped between the first sleeve part and the second sleeve part, and the first sleeve part and the second sleeve part are connected, so that the antenna core 20 is clamped on the limiting structure 11.

[0048] Optionally, two limiting structures 11 are provided, and the two limiting structures 11 are provided on opposite sides of the cavity wall of the accommodating cavity 101, and the antenna core 20 is snap-fitted with both limiting structures 11. Specifically, two second convex strips are provided on the cavity walls on opposite sides of the accommodating cavity 101, and a stopper can be provided on at least one of the cavity walls on opposite sides of the accommodating cavity 101. The slideways 103 formed by the two second convex strips on each side cavity wall are opposite in position and have equal widths, so as to be snap-fitted with both ends of the antenna core 20 in the width direction. The provision of the two limiting structures 11 improves the limiting effect on the antenna core 20, further limits the displacement of the antenna core 20 relative to the rod sleeve 10, and prevents the antenna core 20 from shaking in the accommodating cavity 101.

[0049] In some embodiments, see Figure 3 and Figure 4The side wall of the rod sleeve 10 is also provided with an avoidance hole 104 and a through hole 105 which are both connected to the accommodating cavity 101 and are opened in a perpendicular direction. The hole wall of the avoidance hole 104 is connected to the end face of the second extension end. At this time, the avoidance hole 104 is formed in a notch on the second extension end of the rod sleeve 10. The fixed seat 30 includes a connected rotating member 31 and a connecting member 32. The connecting member 32 is used to connect the external structural member. The connecting member 32 can be cylindrical to facilitate the connection of the feeder. The rotating member 31 is provided with a rotating hole 301. The WiFi antenna structure also includes a pin 40 which is penetrated through the through hole 105 and the rotating hole 301. The rotating member 31 is rotatably connected to the second extension end through the pin 40. In this way, the reliability of the rotational connection between the rotating member 31 and the sleeve rod is improved, and the rotating member 31 is prevented from being separated from the rod sleeve 10. The avoidance hole 104 is located on the rotation path of the fixed seat 30 and is used to avoid the rotation of the fixed seat 30. The fixing seat 30 can rotate between the cavity wall of the accommodating cavity 101 and the hole wall of the avoidance hole 104 . In practical applications, the size of the avoidance hole 104 can be set according to the requirements of the rotation angle of the WiFi antenna structure.

[0050] Specifically, see Figure 3 and Figure 4 The rotating member 31 includes two rotating parts 311 spaced apart from each other, and an escape space for the connecting feeder to pass through can be formed between the two rotating parts 311 spaced apart from each other. The two rotating parts 311 are each provided with a rotating hole 301, and correspondingly, two escape holes 104 are also provided, and the pin 40 can pass through the two rotating parts and the two escape holes 104 to further improve the reliability of the connection to the fixing seat 30. The rotating part 311 can be rotated in contact with the cavity wall of the accommodating cavity 101.

[0051] Optional, see Figure 4 The side wall of the rotating part 311 is provided with a plurality of locking grooves 302, and the cavity wall of the accommodating cavity 101 is provided with a locking protrusion 12. During the rotation process of the rotating member 31, the locking protrusion 12 can be sequentially locked into each locking groove 302 to limit the rotation of the fixed seat 30 relative to the rod sleeve 10. When the direction of the rod sleeve 10 needs to be adjusted, the rod sleeve 10 can be rotated by external force so that the locking protrusion 12 slides out of the current locking groove 302 and slides into another adjacent locking groove 302. When the external force is removed, the locking protrusion 12 is limited in the current locking groove 302, and the rod sleeve 10 also stays at the current rotation angle.

[0052] See also Figure 4In the illustrated embodiment, there are three latching grooves 302, each of which extends along the radial direction of the rotating hole 301. The three latching grooves 302 can be engaged with the latching protrusions 12 to limit the rod sleeve 10 and the fixing seat 30 to 90°, 135° and 180° respectively. Accordingly, the angle between two adjacent latching grooves 302 is 45°. In this way, the rod sleeve 10 can achieve a rotation within a range of 90°, and can have three latching points to achieve the stop of the rod sleeve 10 in three directions.

[0053] In some embodiments, see Figure 4 The cavity wall of the accommodating cavity 101 is provided with a guide groove 106, which passes through to the end surface of the second extension end, and the through hole 105 is located in the extension direction of the guide groove 106. The angle between the groove wall surface of the guide groove 106 close to the through hole 105 and the groove bottom surface of the guide groove 106 is an obtuse angle. The setting of the guide groove 106 can make the rod sleeve 10 compatible with the traditional fixing seat 30 with the rotating shaft and the rotating part 311 integrated. When the traditional fixing seat 30 is installed, it can be seen that the rotating shaft slides into the through hole 105 through the guide groove 106 to achieve a rotation connection with the through hole 105.

[0054] The present invention also provides a router, including the WiFi antenna structure provided in the above embodiments. The WiFi antenna structure has the same structural features and functions as the WiFi antenna structure in the above embodiments, which will not be described in detail here.

[0055] The above description is only a preferred embodiment of the utility model, and only specifically describes the technical principle of the utility model. These descriptions are only for explaining the principle of the utility model and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanation here, any modification, equivalent replacement and improvement made within the spirit and principle of the utility model, and other specific implementation methods of the utility model that can be associated with the technicians in this field without creative labor, should be included in the protection scope of the utility model.

Claims

1. A WiFi antenna structure, characterized in that: include: The rod sleeve extends in a straight line and has a first extension end and a second extension end. The rod sleeve is formed with a receiving cavity extending from the first extension end to the second extension end and an opening located at the second extension end and connected to the receiving cavity. A limiting structure is provided on the cavity wall of the receiving cavity. The antenna core is located in the accommodating cavity and is clamped in the limiting structure; A fixing seat is rotatably connected to the second extension end.

2. The WiFi antenna structure according to claim 1, characterized in that: The limiting structure includes a slideway formed on the inner wall of the accommodating cavity, the slideway extends from the first extension end to the second extension end, and the antenna core is engaged in the slideway through interference fit with the slideway.

3. The WiFi antenna structure according to claim 2, characterized in that: The cavity wall of the accommodating cavity is provided with two first convex strips which are arranged at intervals, and the two first convex strips and the cavity wall of the accommodating cavity together form the slideway.

4. The WiFi antenna structure according to claim 1, characterized in that: The limiting structure includes two second convex strips arranged at intervals and a stopper connecting the two second convex strips. The two second convex strips and the cavity wall of the accommodating cavity together form a limiting groove adapted to be plugged into the antenna core. The first extension end is closed to abut against one end of the antenna core, and the stopper abuts against the other end of the antenna core.

5. The WiFi antenna structure according to any one of claims 2 to 4, characterized in that: There are two limiting structures, which are arranged on opposite sides of the cavity wall of the accommodating cavity, and the antenna core is snap-connected with the two limiting structures.

6. The WiFi antenna structure according to claim 1, characterized in that: The side wall of the rod sleeve is also provided with an avoidance hole and a through hole, both of which penetrate into the accommodating cavity and are opened in perpendicular directions. The hole wall of the avoidance hole penetrates to the end face of the second extension end. The fixing seat includes a connected rotating member and a connecting member, and the connecting member is used to connect an external structural member. The rotating member is provided with a rotation hole. The WiFi antenna structure also includes a pin passing through the through hole and the rotation hole. The rotating member is rotatably connected to the second extension end through the pin. The avoidance hole is located on the rotation path of the fixing seat and is used to avoid the rotation of the fixing seat.

7. The WiFi antenna structure according to claim 6, characterized in that: The rotating member includes two rotating parts spaced apart from each other, both of the rotating parts are provided with the rotating hole, the side walls of the rotating parts are provided with a plurality of locking grooves, and the cavity wall of the accommodating cavity is provided with a locking protrusion. During the rotation process of the rotating member, the locking protrusion can be sequentially locked into each of the locking grooves to limit the rotation of the fixed seat relative to the rod sleeve.

8. The WiFi antenna structure according to claim 7, characterized in that: There are three locking grooves, each of which extends along the radial direction of the rotating hole. The three locking grooves can be engaged with the locking protrusions so that the rod sleeve and the fixing seat are limited to 90°, 135° and 180° respectively.

9. The WiFi antenna structure according to claim 6, characterized in that: A guide groove is provided on the cavity wall of the accommodating cavity, and the guide groove passes through to the end face of the second extending end. The through hole is located in the extending direction of the guide groove, and the angle between the groove wall surface of the guide groove close to the through hole and the groove bottom surface of the guide groove is an obtuse angle.

10. A router, characterized in that: It comprises the WiFi antenna structure as described in any one of claims 1 to 9.

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