A spliced ​​three-frequency column speaker

Abstract

The present invention discloses a spliced ​​three-audio column sound box, comprising a sound box body and a column sound box body detachably arranged on the sound box body, the column sound box body comprising a plurality of vertically spliced ​​column sound boxes, the back of each column sound box unit being provided with a T-shaped guide groove along the length direction, the T-shaped guide grooves on two adjacent column sound boxes being detachably locked and connected by a splicing assembly, and the T-shaped guide groove on the lowest column sound box unit being detachably locked and connected to the sound box body by a supporting device. The present invention detachably locks and connects adjacent column sound boxes on the T-shaped guide grooves by a splicing assembly, and detachably locks and fixes the column sound box body to the sound box body by a supporting device, so that after splicing and assembling, the column sound box body is very firm, has good strength and is not easy to break and overturn, and can reduce the volume after disassembly for easy transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of sound boxes, and in particular to a spliced ​​three-frequency sound column sound box. Background Art

[0002] At present, for speakers used in larger spaces such as conference rooms and concert venues, they still need to be tall to enhance stereo sound effects. These speakers usually set the main circuit device on a speaker body, and then set an overall long sound column on the speaker body, with a sound amplifier and other sound-generating devices on the sound column. This results in the overall height of the speaker being relatively high, making it difficult to package, transport and store. Although some sound columns are now spliced ​​by bolts and assembled on the speaker body, since the spliced ​​sound columns are relatively slender and only connected by bolts, if an emergency occurs at a concert, the sound column is easily broken and overturned due to external forces such as collisions. Summary of the invention

[0003] The purpose of the present invention is to provide a spliced ​​three-frequency sound column speaker, which solves the problem that the sound column installed on the sound box body in the prior art is easily broken and overturned by external force.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A spliced ​​three-audio column sound box comprises a sound box body and a sound box body detachably arranged on the sound box body, wherein the sound box body comprises a plurality of vertically spliced ​​sound box units, each of the sound box units is provided with a T-shaped guide groove on the back side along the length direction, the T-shaped guide grooves on two adjacent sound box units are detachably locked and connected through a splicing assembly, and the T-shaped guide groove on the sound box unit located at the bottom is detachably locked and connected to the sound box body through a supporting device.

[0006] Furthermore, the splicing assembly includes a connecting rod and two I-shaped sliders respectively located in the T-shaped guide grooves on adjacent sound column units, and two avoidance recesses for accommodating and positioning the I-shaped sliders are provided on the same side of the connecting rod, and at least one locking bolt is connected between the two I-shaped sliders and the connecting rod. The I-shaped slider can slide and cooperate with the T-shaped guide groove very smoothly; the avoidance recess is used to accommodate and position the I-shaped slider clamped in the T-shaped guide groove, so as to make room so that the side of the connecting rod can abut against the back of the sound column unit; the locking bolt provides a locking force to maintain the side of the connecting rod tightly abutting against the back of the two adjacent sound column units for locking.

[0007] Furthermore, the support device includes an L-shaped support seat and two I-shaped sliders in the T-shaped guide grooves on the lowest sound column unit, two clearance recesses for accommodating and positioning the I-shaped sliders are provided on the same side of the vertical section of the L-shaped support seat, at least one locking bolt is connected between the two I-shaped sliders and the vertical section of the L-shaped support seat, and at least one fixing bolt is connected between the horizontal section of the L-shaped support seat and the sound box body. The I-shaped slider can slide and cooperate with the T-shaped guide groove very smoothly; the clearance recess provided on the vertical section of the L-shaped support seat is used to accommodate and position the I-shaped slider clamped in the T-shaped guide groove, so as to make room so that the side of the vertical section of the L-shaped support seat can abut against the back of the sound column unit; the locking bolt provides a locking force to maintain the side of the vertical section of the L-shaped support seat in close abutment with the back of the lowest sound column unit for locking; the fixing bolt provides a locking force to lock the horizontal section of the L-shaped support seat with the sound box body.

[0008] Furthermore, each of the air-avoiding recesses is provided with a through hole for inserting a corresponding locking bolt, and each of the I-shaped sliding blocks is provided with a first threaded hole connected to the locking bolt.

[0009] Furthermore, the distance of the avoidance recess in the vertical direction is greater than the length of the I-shaped slider, and the through hole is a strip hole. In this way, due to the adjustable spatial distance, the influence of manufacturing tolerance can be avoided, and the I-shaped slider can be conveniently positioned and accommodated in the avoidance recess during installation.

[0010] Furthermore, the T-shaped guide groove is formed with a clamping edge on both sides of the notch, and the I-shaped slider includes a first plate portion located in the T-shaped guide groove, a second plate portion located in the avoidance recess, and a connecting portion connecting the first plate portion and the second plate portion, and the first plate portion, the second plate portion, and the connecting portion are formed with a clamping opening that matches the clamping edge, and the depth of the avoidance recess is greater than the thickness of the second plate portion. When the I-shaped slider is assembled in the T-shaped guide groove, the clamping openings on both sides of the I-shaped slider are respectively matched with the clamping edges on both sides of the T-shaped guide groove at the notch. Since the depth of the avoidance recess is greater than the thickness of the second plate portion, after tightening the locking bolt, the side surface of the connecting rod or the side surface of the L-shaped support seat can be respectively clamped and matched with an inner surface of the clamping opening on the I-shaped slider to lock the clamping edge at the T-shaped guide groove, and the fixing is greatly increased by plane clamping.

[0011] Furthermore, a reinforcing rib is provided between the vertical section of the L-shaped support seat and the horizontal section of the L-shaped support seat to increase the strength and prevent deformation and damage.

[0012] Furthermore, the top surface of the speaker body and the top surface of the sound column unit are provided with plug-in columns, and the bottom surface of the sound column unit is provided with slots adapted to the plug-in columns. Through the cooperation of the plug-in columns and the slots, the sound column unit and the speaker body or two adjacent sound column units can be pre-positioned and assembled in advance, and then the two adjacent sound column units are locked with a splicing component or the sound column unit and the speaker body are fixed with a supporting device, which can avoid the sound column unit from shifting during the assembly of the locking bolts and affecting the assembly, thereby improving the assembly efficiency; at the same time, the cooperation of the plug-in columns and the slots also further improves the overall strength of the spliced ​​sound column, making it less likely to break and overturn.

[0013] Furthermore, the top surface of the speaker body and the top surface of the sound column unit are provided with a second threaded hole, one end of the plug post has a threaded head adapted to the second threaded hole, and the plug post is detachably mounted on the second threaded hole. The plug post is arranged as a detachable structure, so that after the plug post is disassembled, the space volume can be further reduced during packaging, transportation, and storage.

[0014] Furthermore, the back of the sound column unit and the back of the sound box body are both provided with connection heads, and the connection heads on the sound column unit and the connection heads on the sound box body, as well as the connection heads on two adjacent sound column units, are connected by wires. The connection heads on the sound column unit and / or the sound box body are connected in series by wires to achieve audio signal transmission and sound generation.

[0015] The horizontal section of the L-shaped support seat is provided with a strip-shaped through hole for inserting a fixing bolt, and the top surface of the speaker body is provided with a third threaded hole connected with the fixing bolt.

[0016] A hardware fixing plate is installed on the top surface of the speaker body, and the hardware fixing plate is provided with the second threaded hole for connecting with the threaded head on the plug column and the third threaded hole for connecting with the fixing bolt.

[0017] The column sound unit and the sound box body are both provided with speakers for sound amplification. The sound box body is also provided with conventional circuit structures such as a frequency divider and a driver for driving the speaker to produce sound.

[0018] Compared with the prior art, the present invention provides a spliced ​​three-frequency sound column speaker, which has the following beneficial effects:

[0019] The present invention connects adjacent sound column units in a detachable locking manner on a T-shaped guide groove through a splicing assembly, and detachably locks and fixes the sound column body on the sound box body through a supporting device. In this way, after splicing and assembling, the sound column body is very firm, has good strength and is not easy to break and overturn, and can reduce the volume after disassembly for easy transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of a half-section structure of the present invention;

[0023] Figure 3 for Figure 2 A magnified schematic diagram of the details in the middle;

[0024] Figure 4 for Figure 3 Schematic diagram of the cross section in the BB direction;

[0025] Figure 5 This is a schematic diagram of the installation of the sound column unit and the speaker body;

[0026] Figure 6 It is a schematic diagram of the installation between two adjacent sound column units;

[0027] Figure 7 is a schematic diagram of the structure of the supporting device;

[0028] Figure 8 It is a structural schematic diagram of the splicing components;

[0029] Fig. 9 This is a schematic diagram of the installation of the plug column.

[0030] Figure numerals: 1. speaker body; 11. third threaded hole; 12. hardware fixing plate; 2. sound column body; 21. sound column unit; 211. T-shaped guide groove; 212. card edge; 213. slot; 214. second threaded hole; 215. terminal; 3. splicing assembly; 31. connecting rod; 311. air avoidance recess; 312. through hole; 4. I-shaped slider; 41. first threaded hole; 42. first plate part; 43. second plate part; 44. connecting part; 45. bayonet; 5. locking bolt; 6. supporting device; 61. L-shaped supporting seat; 611. reinforcing rib; 7. fixing bolt; 8. plug column; 81. threaded head. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] 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 invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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.

[0035] Please refer to Figures 1 to 9The present embodiment provides a spliced ​​three-audio column sound box, comprising a sound box body 1 and a column sound box body 2 detachably arranged on the sound box body 1, the column sound box body 2 comprising a plurality of vertically spliced ​​column sound boxes 21, the back of each column sound box unit 21 being provided with a T-shaped guide groove 211 along the length direction, the T-shaped guide grooves 211 on two adjacent column sound boxes 21 being detachably locked and connected by a splicing assembly 3, the T-shaped guide groove 211 on the lowest column sound box unit 21 being detachably locked and connected to the sound box body 1 by a supporting device 6, so that after splicing and assembling, the column sound box body 2 is very firm, has good strength as a whole and is not easy to break and overturn, and can reduce the volume after disassembly for easy transportation.

[0036] Among them, reference Figure 8 The splicing assembly 3 includes a connecting rod 31 and two I-shaped sliders 4 respectively located in the T-shaped guide grooves 211 on the adjacent sound column units 21. Two avoidance recesses 311 for accommodating and positioning the I-shaped sliders 4 are provided on the same side of the connecting rod 31. At least one locking bolt 5 is connected between the two I-shaped sliders 4 and the connecting rod 31. In this way, the I-shaped slider 4 can slide and cooperate with the T-shaped guide groove 211 very smoothly; the avoidance recess 311 is used to accommodate and position the I-shaped slider 4 clamped in the T-shaped guide groove 211, so as to make room for the side of the connecting rod 31 to abut against the back of the sound column unit 21; the locking bolt 5 provides a locking force to maintain the side of the connecting rod 31 to abut tightly against the back of the two adjacent sound column units 21 for locking. Preferably, in this embodiment, a locking bolt 5 is connected between each of the two I-shaped sliders 4 and the connecting rod 31. The connecting rod 31 is made by cutting a hollow metal square tube.

[0037] refer to Figure 7The supporting device 6 includes an L-shaped supporting seat 61 and two I-shaped sliders 4 located in the T-shaped guide grooves 211 on the lowest sound column unit 21. Two avoidance recesses 311 for accommodating and positioning the I-shaped sliders 4 are provided on the same side of the vertical section of the L-shaped supporting seat 61. At least one locking bolt 5 is connected between the two I-shaped sliders 4 and the vertical section of the L-shaped supporting seat 61. Two fixing bolts 7 are connected between the horizontal section of the L-shaped supporting seat 61 and the sound box body 1. In this way, the I-shaped slider 4 can slide and cooperate with the T-shaped guide groove 211 very smoothly; the avoidance recess 311 set on the vertical section of the L-shaped support seat 61 is used to accommodate and position the I-shaped slider 4 clamped in the T-shaped guide groove 211, so as to make room so that the side of the vertical section of the L-shaped support seat 61 can abut against the back of the sound column unit 21; the locking bolt 5 provides a locking force to maintain the side of the vertical section of the L-shaped support seat 61 and the back of the lowest sound column unit 21 to be tightly abutted for locking; the fixing bolt 7 provides a locking force to lock the horizontal section of the L-shaped support seat 61 with the sound box body 1. Preferably, in this embodiment, a locking bolt 5 is connected between each of the two I-shaped sliders 4 and the vertical section of the L-shaped support seat 61. The L-shaped support seat 61 is made of two sections of hollow metal square tubes that are cut and welded and spliced.

[0038] The back of each sound column unit 21 and the back of the sound box body 1 are provided with a connection head 215, and the connection head 215 on the sound column unit 21 and the connection head 215 on the sound box body 1, as well as the connection heads 215 on two adjacent sound column units 21 are connected by wires. The connection heads 215 on each sound column unit 21 are connected in series by wires, or the connection heads 215 on the sound column unit 21 and the sound box body 1 are connected in series to realize the transmission of audio signals of each spliced ​​sound column unit 21, so as to produce sound.

[0039] Specifically, each of the clearance recesses 311 is provided with a through hole 312 for inserting the corresponding locking bolt 5, and each of the I-shaped sliders 4 is provided with a first threaded hole 41 connected to the locking bolt 5. The locking bolt 5 is inserted through the through hole 312 and is threadedly connected to the first threaded hole 41 on the I-shaped slider 4.

[0040] The horizontal section of the L-shaped support seat 61 is provided with a through hole 312 for inserting the fixing bolt 7, and the top surface of the speaker body 1 is provided with a third threaded hole 11 connected to the fixing bolt 7. Preferably, the through hole 312 on the horizontal section of the L-shaped support seat 61 is a strip-shaped through hole.

[0041] The T-shaped guide groove 211 is formed with a clamping edge 212 on both sides of the groove, and each I-shaped slider 4 includes a first plate portion 42 located in the T-shaped guide groove 211, a second plate portion 43 located in the avoidance recess 311, and a connecting portion 44 connecting the first plate portion 42 and the second plate portion 43. The first plate portion 42, the second plate portion 43 and the connecting portion 44 form a clamping groove 45 that cooperates with the clamping edge 212, and the depth of the avoidance recess 311 is greater than the thickness of the second plate portion 43. In this way, when the I-shaped slider 4 is assembled in the T-shaped guide groove 211, the bayonet 45 on both sides of the I-shaped slider 4 respectively cooperates with the card edge 212 on both sides of the T-shaped guide groove 211 at the slot. Since the depth of the avoidance recess 311 is greater than the thickness of the second plate portion 43, after tightening the locking bolt 5, the side surface of the connecting rod 31 or the side surface of the L-shaped support seat 61 can be respectively clamped and matched with an inner surface of the bayonet 45 on the I-shaped slider 4 to lock the card edge 212 at the T-shaped guide groove 211. By fixing in a plane clamping manner, the firmness is greatly increased. Figure 4 shown.

[0042] As an improved implementation, the distance of the avoidance recess 311 in the vertical direction is greater than the length of the I-shaped slider 4, and the through hole 312 is a strip hole. In this way, since there is an adjustable spatial distance along the length direction of the T-shaped guide groove 211, the influence of manufacturing tolerances can be avoided, and the I-shaped slider 4 can be conveniently positioned and accommodated in the avoidance recess 311 during installation.

[0043] refer to Figure 7 As an improved implementation, a reinforcing rib 611 is provided between the vertical section of the L-shaped support seat 61 and the horizontal section of the L-shaped support seat 61 to increase the strength and prevent deformation and damage.

[0044] refer to Figure 5 As an improved implementation, the top surface of the speaker body 1 and the top surface of the sound column unit 21 are provided with a plug post 8, and the bottom surface of the sound column unit 21 is provided with a slot 213 adapted to the plug post 8. Preferably, the plug post 8 is cylindrical. By cooperating with the plug post 8 and the slot 213, the sound column unit 21 and the speaker body 1 or two adjacent sound column units 21 can be pre-positioned and assembled in advance, and then the two adjacent sound column units 21 are locked with the splicing assembly 3 or the sound column unit 21 and the speaker body 1 are fixed with the supporting device 6, which can avoid the displacement of the sound column unit 21 during the assembly of the locking bolt 5 and affect the assembly, thereby improving the assembly efficiency; at the same time, the plug post 8 cooperates with the slot 213, which further improves the overall strength of the spliced ​​sound column, making it less likely to break and overturn.

[0045] Further, refer to Fig. 9The top surface of the speaker body 1 and the top surface of the sound column unit 21 are both provided with a second threaded hole 214, one end of the plug post 8 has a threaded head 81 adapted to the second threaded hole 214, and the plug post 8 is detachably mounted on the second threaded hole 214. By setting the plug post 8 as a detachable structure, after the plug post 8 is disassembled, the space volume can be further reduced during packaging, transportation, and storage.

[0046] In this embodiment, the number of the sound column units 21 used to splice to form the sound column body 2 is preferably two. Of course, in actual application, the number of the sound column units 21 is not limited to three, and three, four, five or more sound column units 21 can also be used to splice to form the sound column body 2 according to actual needs.

[0047] In this embodiment, the lengths of the various sound column units 21 are equal, so that the various sound column units 21 are more regular when they are disassembled and stacked for storage, which is convenient for packaging and storage.

[0048] refer to Figure 5 In this embodiment, in order to improve the strength, a hardware fixing plate 12 is installed on the top surface of the speaker body 1 by screws, and the hardware fixing plate 12 is provided with a second threaded hole 214 for connecting to the threaded head 81 on the plug column 8 and a third threaded hole 11 for connecting to the fixing bolt 7.

[0049] It should be noted that both the sound column unit 21 and the sound box body 1 are provided with speakers for sound amplification, and the sound box body 1 is also provided with conventional circuit structures such as a frequency divider and a driver for driving the speaker to produce sound.

[0050] In addition, the sound column units 21 may be set to different lengths, and better sound effects may be achieved by combining and splicing the sound column units 21 of different lengths.

[0051] Assembly and disassembly storage instructions of the present invention:

[0052] When assembling, refer to Figure 5First, slide the two I-shaped sliders 4 along the T-shaped guide grooves 211 to the lower part of a sound column unit 21, and then place the sound column unit 21 on the top surface of the sound box body 1, and plug the slots 213 provided on the bottom surface of the sound column unit 21 into the plug posts 8 provided on the top surface of the sound box body 1, so that the first sound column unit 21 is pre-positioned and placed on the sound box body 1; then, the two air-avoiding recesses 311 provided on the vertical section of the L-shaped support seat 61 are correspondingly engaged with the I-shaped slider 4, and the I-shaped slider 4 is preliminarily connected to the vertical section of the L-shaped support seat 61 with two locking bolts 5; then, the two fixing bolts 7 are respectively passed through the through holes 312 provided on the horizontal section of the L-shaped support seat 61. After that, the third threaded hole 11 on the sound box body 1 is locked, so that the L-shaped support seat 61 is firmly connected to the sound box body 1; at this time, the two locking bolts 5 on the vertical section of the L-shaped support seat 61 are tightened, and the locking bolts 5 are used to provide a locking force to maintain the side surface of the vertical section of the L-shaped support seat 61 in close contact with the back surface of the sound column unit 21, and the side surface of the vertical section of the L-shaped support seat 61 is clamped and matched with an inner surface of the bayonet 45 on the I-shaped slider 4 to lock the clamping edge 212 at the T-shaped guide groove 211, so that the L-shaped support seat 61 and the sound column unit 21 are firmly installed.

[0053] refer to Figure 6 , take another I-shaped slider 4 and slide it along the T-shaped guide groove 211 to the upper part of the fixedly installed sound column unit 21, then slide another I-shaped slider 4 along the T-shaped guide groove 211 to the lower part of the second sound column unit 21, and then The slot 213 provided on the bottom surface of the sound column unit 21 is plugged into the plug post 8 provided on the top surface of the fixedly installed sound column unit 21, so that the second sound column unit 21 is pre-positioned and placed on the installed sound column unit 21; then, the two avoidance recesses 311 provided on the connecting rod 31 are respectively correspondingly engaged with the I-shaped sliders 4 located on the two adjacent sound column units 21, and the I-shaped sliders 4 and the connecting rod 31 are correspondingly screwed and connected by two locking bolts 5, and the locking bolts 5 provide a locking force to maintain the side surface of the connecting rod 31 in close contact with the back surface of the two adjacent sound column units 21, and the side surface of the connecting rod 31 is clamped and matched with an inner surface of the bayonet 45 of the I-shaped slider 4 located on the two adjacent sound column units 21 to lock the clamping edge 212 at the T-shaped guide groove 211, so that the two adjacent sound column units 21 are firmly installed, and the fixation by plane clamping greatly increases the firmness, such as Figure 4 When more sound column units 21 need to be installed, other sound column units 21 can be spliced ​​on the basis of the above. The sound column body 2 assembled in this way is very strong, has good strength and firmness, and is not easy to break and fall over. Figure 1 and Figure 2After the assembly is completed, the sound column units 21 and the connection heads 215 on the sound box body 1 are connected in series with electric wires in sequence to realize the transmission of audio signals after the assembly, thereby producing sound.

[0054] When storage is required, each sound column unit 21 can be disassembled according to the reverse operation of assembly. After disassembly, the volume can be greatly reduced, which is convenient for packaging, storage and transportation.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A spliced ​​three-frequency column speaker, comprising a speaker body (1) and a column speaker body (2) detachably arranged on the speaker body (1), characterized in that: The sound column body (2) comprises a plurality of vertically spliced ​​sound column units (21), the back side of each of the sound column units (21) being provided with a T-shaped guide groove (211) along the length direction, the T-shaped guide grooves (211) on two adjacent sound column units (21) being detachably locked and connected via a splicing assembly (3), and the T-shaped guide groove (211) on the lowest sound column unit (21) being detachably locked and connected to the sound box body (1) via a supporting device (6); The splicing assembly (3) comprises a connecting rod (31) and two I-shaped sliders (4) respectively located in T-shaped guide grooves (211) on adjacent sound column units (21); two space-avoiding recesses (311) for accommodating and positioning the I-shaped sliders (4) are provided on the same side of the connecting rod (31); at least one locking bolt (5) is connected between the two I-shaped sliders (4) and the connecting rod (31); the supporting device (6) comprises an L-shaped supporting seat (61) and two lowermost locking bolts (5). An I-shaped slider (4) in a T-shaped guide groove (211) on a square sound column unit (21), two clearance recesses (311) for accommodating and positioning the I-shaped slider (4) are provided on the same side of the vertical section of the L-shaped support seat (61), at least one locking bolt (5) is connected between the two I-shaped sliders (4) and the vertical section of the L-shaped support seat (61), and at least one fixing bolt (7) is connected between the horizontal section of the L-shaped support seat (61) and the sound box body (1); Each of the avoidance recesses (311) is provided with a through hole (312) for inserting a corresponding locking bolt (5), and each of the I-shaped sliders (4) is provided with a first threaded hole (41) connected to the locking bolt (5); the T-shaped guide groove (211) is formed with a clamping edge (212) on both sides of the groove, and the I-shaped slider (4) comprises a first plate portion (42) located in the T-shaped guide groove (211), a second plate portion (43) located in the avoidance recess (311), and a connecting portion (44) connecting the first plate portion (42) and the second plate portion (43); the first plate portion (42), the second plate portion (43) and the connecting portion (44) are formed with a clamping port (45) that cooperates with the clamping edge (212), and the depth of the avoidance recess (311) is greater than the thickness of the second plate portion (43).

2. The spliced ​​three-frequency column speaker according to claim 1, characterized in that: The distance of the avoidance recess (311) in the vertical direction is greater than the length of the I-shaped sliding block (4), and the through hole (312) is a strip-shaped hole.

3. The spliced ​​three-frequency column speaker according to claim 1, characterized in that: A reinforcing rib (611) is provided between the vertical section of the L-shaped support seat (61) and the horizontal section of the L-shaped support seat (61).

4. The spliced ​​three-frequency column speaker according to claim 1, characterized in that: The top surface of the sound box body (1) and the top surface of the sound column unit (21) are provided with plug posts (8), and the bottom surface of the sound column unit (21) is provided with slots (213) adapted to the plug posts (8).

5. The spliced ​​three-frequency column speaker according to claim 4, characterized in that: A second threaded hole (214) is provided on the top surface of the sound box body (1) and the top surface of the sound column unit (21); one end of the plug post (8) has a threaded head (81) adapted to the second threaded hole (214); and the plug post (8) is detachably mounted on the second threaded hole (214).

6. The spliced ​​three-frequency column speaker according to claim 1, characterized in that: The back of the sound column unit (21) and the back of the sound box body (1) are both provided with connection heads (215); the connection heads (215) on the sound column unit (21) and the connection heads (215) on the sound box body (1), as well as the connection heads (215) on two adjacent sound column units (21), are all connected via electric wires.

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